Ordering by number: this is 3303005386OS, the Chicago Pneumatic muffler assy – CP1230/1260 older style. Exhaust treatment on a tool is a hearing-protection item as much as a comfort one, and elements load up with oil and dust over time.

Give us the model and serial off your machine and we will confirm the fit; the full diagram library and the Chicago Pneumatic tool range are the other two places to start. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.

• Part number: 3303005386OS
• Manufacturer: Chicago Pneumatic
• Crowder SKU: CP-3303005386OS