OREGON 3/8P 8-TOOTH STANDARD 7 SPLINE POWER MATE RIM SPROCKET

This is Oregon's 22273 Power Mate Replacement Rim used on Oregon 16372X, 22271X, 26580X, and 28563X Power Mate Rim Sprocket Systems. 

For 38" Pitch Chain Saws with 8-Tooth Standard 7 Spline (Sd7) Rim Sprocket System

Replace rim every two chain loops