Lenovo ThinkPad P16v Gen 3 with Omarchy
Six attributable exact-model Linux owners and an exact RHEL certification show broad support alongside separate dock, graphics and power-state constraints. None is an Arch Linux result.
Bottom line
The Linux record is broader than the known failures. Exact owner reports establish Intel desktop graphics, NVIDIA CUDA work, direct HDMI, Wi-Fi and Bluetooth. Red Hat's exact 21RT certification adds working audio playback and recording, camera, display backlight, networking, Thunderbolt and suspend functions under RHEL 10. Lenovo's exact-model Linux guide documents the keyboard, TrackPoint, trackpad and optional fingerprint setup paths, but it is not an owner test. The direct Omarchy report still leaves closed-lid dock boot unresolved, with no P16v retest or shipped fix in the current thread. A later Omarchy 4.0.2 report reproduced the same suspend and networking chain on different Dell hardware even though its dock had already appeared, so late Thunderbolt enumeration alone is not an established cause. Separate Ubuntu owners report kernel-dependent power failures and configuration-sensitive sleep and NVIDIA behavior. No exact-model Arch report establishes how Omarchy's closest base behaves.
Should you use or buy it?
This is most compelling when you need NVIDIA compute, professional certifications, two memory slots, two SSD slots or a large port selection. Prefer the 500-nit, 100% sRGB low-power IPS panel over the basic 45% NTSC panel unless you specifically need OLED. During the return window, verify the function row, keyboard backlight, both pointing devices and fingerprint reader instead of treating Lenovo's Linux instructions as an Omarchy result. For now, boot with the lid open and compare direct HDMI with docked DisplayPort. If a failed boot-time suspend leaves NetworkManager asleep, the exact P16v owner restored networking by restarting the service; the panel icon remained stale until the shell restarted. The proposed external-power lid-policy override has no P16v reboot confirmation. Keep a known-good kernel for rollback and use the LVFS firmware path. Lenovo warns that a 100 MB EFI system partition can block firmware updates and recommends 260 MB. Optional 5G needs the matching regional RW350 configuration and Lenovo's Linux setup.
- Screen size
- 16 inchesSource
- Dimensions (W × D × H)
- 14.23 × 9.79 × 0.50–0.77 inches front to rear; 1.04-inch maximumSource
- Weight
- About 4.6 poundsSource
- Release
- Available September 2025Source
- Launch price
- €1,939Initial EMEA configurationThinkPad P16v Gen 3 announcement
- Current new price
- $3,207.96U.S. part 21RS0031US · observed Sept. 2, 2026Current ThinkPad P16v Gen 3 configuration
Current figures are dated asking prices, not completed sales or appraisals.
Compatibility
- Working reports
- Mixed results
- Evidence, no verdict
Before you buy
Match the seller's exact model and configuration to the findings above. Check the return period, condition, included charger and delivered price before ordering.
- Check seller options at lenovo.com · price source checked Sept. 2, 2026
These are the sources behind the dated asking prices, not a live stock check. Searches and catalogs may include other configurations. We have not tested or endorsed individual listings.
These links are untagged; Omarchy Hardware earns no referral commission from them. How we handle commercial links.
Detailed findings
Install and boot
Booting Omarchy with the lid closed on a Thunderbolt dock caused logind to start a suspend before docked-lid policy protected the session. The suspend never completed and networking stayed asleep. A later different-hardware report reproduced that chain even with an already-enumerated dock, so the P16v timing observation is not a complete cause. Ubuntu publishes an exact-model OEM support package and certifies two configurations on custom 24.04 images; Red Hat separately certifies one exact configuration for RHEL 10.
In practice Open the lid for boot until there is a P16v owner-confirmed fix. This does not establish an installation or ordinary open-lid boot problem. The proposed external-power lid-policy override remains unverified, and the Ubuntu and Red Hat records do not predict Omarchy's Arch packages.
Sources ThinkPad P16v Gen 3 closed-lid dock boot report, Cross-model Omarchy closed-lid dock reproduction, Ubuntu OEM support package for ThinkPad P16v Gen 3, Ubuntu-certified Core Ultra 7 and RTX PRO 1000 configuration, Ubuntu-certified Core Ultra 9 and RTX PRO 2000 configuration, RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN
Desktop and graphics
One Ubuntu owner found Android Studio's emulator more usable under X11, but reported that the desktop's dark theme then required Nouveau rather than the proprietary NVIDIA driver. Linux Mint separately ran the internal display on Intel graphics, while two other owners reached RTX Pro GPUs for CUDA and Wayland applications. Red Hat certifies accelerated graphics on one exact 21RT configuration.
In practice Intel desktop graphics and NVIDIA workloads both have positive evidence, but the Ubuntu report shows an application, display-server and driver tradeoff. No retained report establishes dependable hybrid switching or direct Omarchy GPU workloads.
Sources ThinkPad P16v Gen 3 Ubuntu power and graphics report, ThinkPad P16v Gen 3 docked-display report, ThinkPad P16v Gen 3 Ubuntu CUDA workload, ThinkPad P16v Gen 3 Zorin and Wayland workload, RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN
Internal display and brightness
The Linux Mint owner reported the laptop screen available at 1920 by 1200 and confirmed that a monitor worked through direct HDMI. Red Hat's exact 21RT certification includes LCD backlight control.
In practice The positive evidence covers the internal panel and backlight under other Linux systems. The reported display failure is limited to DisplayPort monitors routed through one Thunderbolt 5 dock.
Sources ThinkPad P16v Gen 3 docked-display report, RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN
Keyboard, hotkeys and backlight
Lenovo's exact-model Linux guide documents ordinary function keys, FnLock, audio and microphone controls, display brightness and selection, sleep, and optional keyboard-backlight controls. The retained owner reports do not verify those functions under Omarchy or Arch.
In practice This is a documented Linux path, not a compatibility verdict. Test the function row, number pad and optional keyboard backlight during the return window.
Sources ThinkPad P16v Gen 3 Intel platform specifications, ThinkPad P16v Gen 3 Linux user guide, Lenovo ThinkPad P16v Gen 3 review, ThinkPad P16v Gen 3 workstation review, RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN
Touchpad and pointing
Lenovo's exact-model Linux guide documents TrackPoint pointing, clicking and scrolling, its three physical buttons, and trackpad tapping, right-clicking, two-finger scrolling and zoom. No retained owner report tests those behaviors under Omarchy or Arch.
In practice The operating paths are documented, but palm rejection, gesture behavior and daily reliability remain unverified. Test the TrackPoint and trackpad separately.
Sources ThinkPad P16v Gen 3 Intel platform specifications, ThinkPad P16v Gen 3 Linux user guide, Lenovo ThinkPad P16v Gen 3 review, ThinkPad P16v Gen 3 workstation review
Fingerprint and biometrics
Lenovo's exact-model Linux guide says equipped configurations can enroll fingerprints through the desktop's Fingerprint Login settings. No retained source identifies the fingerprint device or confirms enrollment and login under Omarchy or Arch; face login is also unverified.
In practice Fingerprint setup has a manufacturer-documented Linux path, but this profile has no owner result. Treat fingerprint and face login as separate return-window checks.
Sources ThinkPad P16v Gen 3 Intel platform specifications, ThinkPad P16v Gen 3 Linux user guide, RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN
Wi-Fi and Bluetooth
Wi-Fi remained unavailable after the failed Omarchy suspend because NetworkManager never received the matching wake event. Restarting NetworkManager restored connectivity, although the shell's Wi-Fi indicator stayed stale until the shell restarted. A second Omarchy owner on different hardware reproduced both the stranded service and the recovery. In the separate Linux Mint report, Intel Wi-Fi and Bluetooth were both up. Red Hat's exact certification includes Wi-Fi and Bluetooth support.
In practice This is a suspend-state failure, not evidence that the Intel radio generally fails. If it occurs, verify connectivity outside the panel after restarting NetworkManager. The optional 5G modem is a separate component with a vendor-specific Linux setup.
Sources ThinkPad P16v Gen 3 closed-lid dock boot report, Cross-model Omarchy closed-lid dock reproduction, ThinkPad P16v Gen 3 docked-display report, RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN, Lenovo Linux WWAN enablement
Speakers, microphone and audio
Red Hat's exact 21RT certification lists stereo audio playback, recording and HDMI audio as supported under RHEL 10. Linux Mint also loaded the Intel SOF, PipeWire and dock USB-audio paths, although that owner did not report a listening or microphone test.
In practice There is a positive exact-model certification result for input and output, but no direct Omarchy audio result or owner assessment of speaker and microphone quality.
Sources RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN, ThinkPad P16v Gen 3 docked-display report
Camera
Red Hat's exact 21RT certification lists the USB camera as supported under RHEL 10, and Linux Mint loaded uvcvideo for the integrated Chicony camera.
In practice That establishes a working certified camera path, not camera quality, infrared login or a direct Omarchy video-call result.
Sources RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN, ThinkPad P16v Gen 3 docked-display report
Suspend and resume
One Ubuntu owner forced lid-closed and monitor-connected sleep in the operating-system configuration. The Omarchy report's closed-lid boot suspend wedged before reaching the process-freeze stage. A different-hardware Omarchy 4.0.2 report later reproduced the same sequence, but no P16v retest validates the proposed lid-policy change. A separate Ubuntu report found that suspend, shutdown and reboot worked on OEM kernel 6.17.0-1020 and failed after updating to 6.17.0-1023. Red Hat certifies suspend on lid, to memory and to disk for one exact 21RT configuration.
In practice Working, configurable and failing exact-model results coexist across kernels and distributions. Treat the external-power override as a proposal, not a fix. The Ubuntu kernel rollback and RHEL certification are useful comparisons, not confirmed Omarchy resolutions.
Sources ThinkPad P16v Gen 3 Ubuntu power and graphics report, ThinkPad P16v Gen 3 closed-lid dock boot report, Cross-model Omarchy closed-lid dock reproduction, ThinkPad P16v Gen 3 Ubuntu OEM kernel regression, RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN
External displays and docks
A Linux Mint report found that two DisplayPort monitors connected through a Thunderbolt 5 dock were not detected. Direct HDMI worked and the dock's other ports remained available. The Omarchy report documents a separate closed-lid boot failure in which docked-lid policy did not prevent suspend.
In practice Test direct HDMI and docked DisplayPort separately. A working dock for audio, USB or networking does not establish working video output.
Sources ThinkPad P16v Gen 3 docked-display report, ThinkPad P16v Gen 3 closed-lid dock boot report
Battery, power and thermals
One Ubuntu owner identified missed lid and monitor sleep as a major source of drain and reported a roughly threefold battery-life improvement after changing sleep behavior, firmware charging settings and CPU-frequency management. A Windows review of a Core Ultra 7 and RTX Pro 2000 unit measured 14 hours, 11 minutes of Wi-Fi browsing at 150 nits and 8 hours, 51 minutes at full brightness.
In practice The owner result shows that Linux configuration can materially change battery use, but provides no absolute runtime or controlled comparison. The review establishes hardware capacity, not Omarchy runtime; panel choice and GPU load will change the result.
Sources ThinkPad P16v Gen 3 Ubuntu power and graphics report, ThinkPad P16v Gen 3 measured review, ThinkPad P16v Gen 3 Intel platform specifications, RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN
Daily use
Docked desk use
Needs exact-path testing
Two exact P16v reports describe different dock failures: closed-lid boot on Omarchy and DisplayPort output through a Thunderbolt 5 dock on Linux Mint. A second-hardware Omarchy report reproduced the boot-time suspend and networking chain but showed that a late-appearing dock is not the only possible explanation. None establishes ordinary open-lid use with a direct display connection.
Sources ThinkPad P16v Gen 3 closed-lid dock boot report, Cross-model Omarchy closed-lid dock reproduction, ThinkPad P16v Gen 3 docked-display report
Firmware maintenance has a Linux path
LVFS carries Lenovo-signed system firmware for the exact model
The exact LVFS device record carries four P16v Gen 3 system-firmware releases, including version 1.18 dated Aug. 11, 2026. Earlier entries record Lenovo testing with fwupd on Ubuntu. Lenovo separately warns that a 100 MB EFI system partition can make firmware updates fail and recommends 260 MB.
Sources ThinkPad P16v Gen 3 system firmware on LVFS, ThinkPad P16v Gen 3 system firmware release notes
Optional 5G is not a generic modem path
The regional RW350 configuration has Lenovo Linux enablement
Lenovo's specification limits the RW350R-GL option to selected markets. Its Linux repository names the P16v Gen 3 and RW350 as a supported pair and provides the FCC-unlock and SAR setup; that is vendor support, not an Omarchy owner result.
Sources ThinkPad P16v Gen 3 Intel platform specifications, Lenovo Linux WWAN enablement
Portable for a workstation, upgradeable for a laptop
Starts around 4.6 pounds; one exact configuration lasted 14 hours, 11 minutes in a 150-nit Wi-Fi test
The chassis is as much as 1.04 inches thick, but its memory and storage are not soldered. Notebookcheck's Core Ultra 7, RTX Pro 2000 and 90 Wh configuration fell to 8 hours, 51 minutes at full brightness. Those measurements show the hardware's Windows capacity, not Omarchy runtime.
Sources ThinkPad P16v Gen 3 Intel platform specifications, ThinkPad P16v Gen 3 measured review
Avoid the base display for color-sensitive work
459 nits and 67% sRGB in the measured review; better IPS and OLED panels are available
The basic 1920-by-1200, 60 Hz review panel was bright and matte but covered only 67% of sRGB. Lenovo's 500-nit low-power IPS option covers 100% of sRGB, while the 3840-by-2400 OLED covers DCI-P3 and adds touch at a likely battery cost.
Sources ThinkPad P16v Gen 3 Intel platform specifications, Lenovo ThinkPad P16v Gen 3 review
Good keyboard, small offset touchpad
Comfortable typing with a cramped pointer surface
Two reviewers found the keyboard comfortable for extended work, and the number pad is useful for data entry. PCWorld found the touchpad small and far to the left for right-handed use. These are physical observations under Windows, not Linux input-compatibility tests.
Sources Lenovo ThinkPad P16v Gen 3 review, ThinkPad P16v Gen 3 workstation review
Performance
CUDA development
RTX Pro 500 detected with NVIDIA driver 590 and CUDA 13.1 on Ubuntu 24.04
The owner ran a GPU-accelerated logic-synthesis workload and reproduced an application failure after repeated passes. Follow-up isolated a zero-candidate code path in the application; the same failure occurred with CUDA 12.8 and was not attributed to the laptop.
Robotics visualization on Wayland
Zorin OS 18.1, Wayland and the RTX Pro 2000 appear together in one exact-model report
The owner ran PlotJuggler from an AppImage and could render numeric topics. The failed point-cloud visualization reproduced on both encoded and decoded data, leading the owner to suspect the bag rather than the workstation.
Professional multitasking
Comfortable with VS Code, a terminal, browser tabs and several desktop applications in one Windows review
TechRadar's reviewer used the RTX Pro 2000 configuration for a mixed coding and office workload without a responsiveness complaint. The same review positions CAD, engineering and media creation as intended workloads but does not publish controlled results for them.
Sustained CPU and GPU work
9,723 in PCMark 10 and 42 seconds in Blender Classroom CUDA
Notebookcheck measured those results on a Core Ultra 7 255H and RTX Pro 2000 configuration. Its RTX Pro 2000 ran at 60 watts, limiting performance below the GPU's higher-power configurations. These are Windows measurements of hardware capacity, not Omarchy benchmarks.
Changes over time
-
Exact RHEL 10 certification published
Red Hat's 21RTZD5ECN record lists accelerated graphics, LCD backlight, networking, audio input and output, camera, power monitoring and three suspend functions as supported. This is RHEL certification, not Omarchy testing.
Sources RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECN
-
Ubuntu owner restores lid and monitor sleep behavior
The owner forced sleep when closing the lid or using a monitor and identified missed sleep as a major source of battery drain. The report supplies no absolute runtime or controlled comparison.
Sources ThinkPad P16v Gen 3 Ubuntu power and graphics report
-
X11 changes the Ubuntu application tradeoff
Android Studio's emulator behaved better under X11, but the desktop's dark theme then depended on changing from the proprietary NVIDIA driver to Nouveau in this owner's setup.
Sources ThinkPad P16v Gen 3 Ubuntu power and graphics report
-
Docked DisplayPort failure reported
Linux Mint did not detect two monitors through a Thunderbolt 5 dock, while direct HDMI and the dock's other ports worked.
-
Ubuntu CUDA workload reaches the RTX Pro 500
NVIDIA driver 590 and CUDA 13.1 ran a GPU logic-synthesis workload. The reported repeated-pass failure was later traced to application code rather than the GPU.
-
Ubuntu OEM kernel regression reported
Suspend, shutdown and reboot failures appeared after a kernel update and disappeared when the owner returned to the previous kernel.
-
Zorin and Wayland environment reported
A Core Ultra 9 and RTX Pro 2000 owner ran PlotJuggler under Zorin OS 18.1 and Wayland. The reported visualization problem followed the source data rather than the machine.
-
System firmware 1.18 reaches LVFS
LVFS published Lenovo's cryptographically signed P16v Gen 3 system firmware 1.18 for native Linux delivery. Firmware availability does not resolve the separate dock or kernel regressions by itself.
-
Closed-lid Omarchy dock boot failure reported
Closed-lid boot triggered suspend before docked-lid policy protected the session. The suspend did not finish, NetworkManager remained asleep and the issue has no P16v owner-confirmed fix.
Sources
Omarchy reports are direct results. Arch, Arch-based and other Linux reports are labeled separately and used only as evidence of hardware or driver behavior that may carry over. Shared-identifier and related-model reports are context and do not enter the exact-model count.
- ThinkPad P16v Gen 3 closed-lid dock boot reportOpen source
Field report on GitHub · Omarchy · Aug. 28, 2026
Exact machine type, CPU, GPUs, network, suspend mode and five-boot Omarchy 4.0.1 failure path. The complete current thread contains no P16v retest or shipped fix; a later different-hardware report narrows the diagnosis without adding to the exact-model count.
- Cross-model Omarchy closed-lid dock reproductionOpen source
Related-model field report on GitHub · Sept. 2, 2026
A different Dell laptop on Omarchy 4.0.2 reproduces the same incomplete suspend and stranded NetworkManager state even though its Thunderbolt dock enumerated earlier. It challenges the original timing diagnosis but is not a P16v field report.
- ThinkPad P16v Gen 3 docked-display reportOpen source
Field report on Linux Mint Forums · other Linux · March 3, 2026
Exact DMI model and a connection-path comparison: docked DisplayPort failed, direct HDMI worked and the dock's other ports remained available. This is Linux Mint evidence, not an Omarchy result.
- ThinkPad P16v Gen 3 Ubuntu OEM kernel regressionOpen source
Field report on Ubuntu Bugs · other Linux · June 1, 2026
Exact DMI model, two kernel builds and a repeatable rollback comparison for suspend, shutdown and reboot. This is Ubuntu evidence, not an Omarchy result.
- ThinkPad P16v Gen 3 Ubuntu CUDA workloadOpen source
Field report on GitHub · other Linux · March 9, 2026
One exact-model Ubuntu owner identifies the Core Ultra 7 255H, RTX Pro 500, NVIDIA 590 driver and CUDA 13.1 environment. The reported repeated-pass failure was traced to application code, not counted as a hardware problem.
- ThinkPad P16v Gen 3 Zorin and Wayland workloadOpen source
Field report on GitHub · other Linux · July 6, 2026
One exact-model Zorin OS owner identifies the Core Ultra 9 285H, Intel graphics, RTX Pro 2000, Wayland and OEM kernel. The visualization problem followed the input data, not the workstation.
- ThinkPad P16v Gen 3 Ubuntu power and graphics reportOpen source
Field report on Reddit · other Linux · Feb. 2, 2026
One exact-model owner identifies preinstalled Ubuntu, lid and monitor sleep configuration, an owner-reported relative battery improvement after auto-cpufreq, and X11 and NVIDIA application behavior. The report supplies no absolute runtime or controlled battery comparison.
- RHEL 10 certification for ThinkPad P16v Gen 3 21RTZD5ECNOpen source
Official compatibility record on Red Hat · Nov. 26, 2025
Exact-model certification with capability-level support records for graphics, backlight, networking, audio, camera, Thunderbolt, power monitoring and suspend. This is RHEL 10 evidence, not an Omarchy or Arch field report.
- Ubuntu-certified Core Ultra 7 and RTX PRO 1000 configurationOpen source
Official compatibility record on Ubuntu
Exact-model Ubuntu 24.04 LTS certification for a Core Ultra 7 255H and RTX PRO 1000 configuration. Canonical warns that the certified custom image may differ from standard Ubuntu; this is not an Omarchy field report.
- Ubuntu-certified Core Ultra 9 and RTX PRO 2000 configurationOpen source
Official compatibility record on Ubuntu
Exact-model Ubuntu 24.04 LTS certification for a Core Ultra 9 285H and RTX PRO 2000 configuration. Canonical warns that the certified custom image may differ from standard Ubuntu; this is not an Omarchy field report.
- Lenovo ThinkPad P16v Gen 3 reviewOpen source
Original measured review on PCWorld
Original Windows review with exact configuration, storage, battery, display, keyboard and comparative performance measurements. It establishes hardware capacity and physical experience, not Omarchy behavior.
- ThinkPad P16v Gen 3 measured reviewOpen source
Original measured review on Notebookcheck · Jan. 16, 2026
Original Windows review of exact configuration 21RS000DGE with display, battery, power, temperature, CPU, GPU and workstation measurements. It establishes hardware capacity, not Omarchy performance.
- ThinkPad P16v Gen 3 Intel platform specificationsOpen source
Manufacturer specification on Lenovo · Aug. 27, 2026
Official current specification used for factory processor, graphics, memory, storage, display, battery, radio, camera, audio and port options; it is not a Linux result.
- ThinkPad P16v Gen 3 Linux user guideOpen source
Project documentation on Lenovo · Aug. 1, 2025
Official exact-model Linux guide for machine types 21RS and 21RT. It documents keyboard, TrackPoint, trackpad, optional fingerprint and NVIDIA setup paths but is not an Omarchy or owner compatibility test.
- Ubuntu OEM support package for ThinkPad P16v Gen 3Open source
Official compatibility record on Ubuntu
Ubuntu's archive names oem-sutton-daruka-meta as hardware support for the exact model. This establishes a model-specific OEM package, not standard-image or Omarchy compatibility.
- ThinkPad P16v Gen 3 system firmware release notesOpen source
Manufacturer specification on Lenovo · April 20, 2026
Exact 21RS and 21RT firmware history plus Lenovo's warning that a 100 MB EFI system partition can cause update failures and its 260 MB recommendation. Windows utility instructions are not Linux results.
- ThinkPad P16v Gen 3 system firmware on LVFSOpen source
Official compatibility record on LVFS · Aug. 11, 2026
Exact-model native Linux firmware record with versions, dates, signed Lenovo upload status and earlier Ubuntu fwupd test annotations. Low-confidence success percentages are not used as reliability claims.
- Lenovo Linux WWAN enablementOpen source
Project documentation on GitHub
Lenovo names the Rolling Wireless RW350 and P16v Gen 3 as a supported module-system pair and supplies its Linux setup path. This does not establish that every regional configuration includes the modem.
- ThinkPad P16v Gen 3 workstation reviewOpen source
Original hands-on review on TechRadar · July 4, 2026
Original exact-model Windows review of a Core Ultra 9 and RTX Pro 2000 configuration for physical use, professional multitasking, microphone, battery and portability context; not a Linux result.
- Omarchy 4.0.2 releaseOpen source
Release record on GitHub
Current release baseline; its notes do not claim a fix for this dock-boot report.
- ThinkPad P16v Gen 3 announcementOpen source
Manufacturer specification on Lenovo · Sept. 5, 2025
Official September availability and initial EMEA price. Product image is an exact P16v Gen 3 Intel asset from Lenovo.
- Current ThinkPad P16v Gen 3 configurationOpen source
Dated market snapshot on Lenovo · Sept. 2, 2026
Orderable direct-from-Lenovo U.S. ask for part 21RS0031US.