Compatible With: fit for Stihl MS170 MS180 MS250 MS251 MS230 MS210 017 018 021 023 025 Chainsaw. Rim Sprocket Model: 3/8LP Picco, 7 Teeth. 1 x P7 Sprocket Rim. 1 x Clutch Drum. Manufacturer Part Number: 0000 642 1240, 9460 624 0801, 0000 958 1032, 0000 958 1022.
eBay