Ordering by number: this is 2911011000, the Chicago Pneumatic unloading valve kit. Kits like this group the parts that get replaced together, which saves ordering them one at a time and cuts a second teardown out of the job.

Give us the model and serial off your machine and we will confirm the fit; the parts diagram hub and the Chicago Pneumatic tool range are the other two places to start. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.

• Part number: 2911011000
• Manufacturer: Chicago Pneumatic
• Crowder SKU: CP-2911011000