Sprocket System 3/8"-7 Size:513470X 3/8" 7 SMALL 7 5/8" x 40" has a

5/8" x 40" has a 1-1/8" Low Friction Ring and a 1-1/2" Low Friction Ring 3/4" x 50 has a 1-1/8" Low Friction Ring and a 1-1/2" Low Friction Ring  and 7/8" x 60" has a 1-1/8" Low Friction Ring and a 1-1/2" Low Friction Ring

• Increased flexibility in the bar body

Double-lined outer shell with zero chance of water leakage

Sleeve Length: Underarm 21" from size tag to cuff end 35"

Sprocket System 3/8"-7 Size:513470X 3/8" 7 SMALL 7 5/8" x 40" has aOREGON rim sprocket system. This sprocket system consists of two components: Clutch cup with splined hub, and a free floating rim. It is only the rim that makes contact with your saw chain as it is driven around your guide bar. Oregon 38470X Replacement Power Mate Sprocket System includes a drum with a replaceable rim, allowing the rim to be replaced.(Bearing 37504 sold separately) For 3 8" Pitch Chain Saws, 7 Tooth Sprocket, Standard 7 Spline (Sd7)