The Oregon 27189X Power Mate Rim Sprocket System includes a 3/8" pitch standard 7 Spline (SD7) rim sprocket that can be used on all types of chain saws. This sprocket allows you to extend the operational life of your chainsaw by maximizing chain and bar groove alignment, all while reducing your overall costs. The sprocket's two-piece design includes a drum with replaceable rim, allowing the rim to be change multiple times before you need to get a new unit. This sprocket should be replaced after three rims.

• Genuine OEM Oregon Product

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov