ITEM NAME:7T Clutch Drum Chain Sprocket Bearing fit for Stihl 021 023 025 MS230 MS250 Hf Clutch Cover Drum Sprocket Bearing Replacement Fit For Stihl 021 023 025 MS230 MS250 SPECIFICATIONS.(Compatible With: Fit for Stihl 021 023 025 MS230 MS250 Chainsaw. Clutch Drum Size: approx. Clutch Drum Model.325" 7 Teeth. 1 x Clutch Drum. Bearing Size: approx. 1 x Bearing. 2) Perfect match for the original one.