ITEM NAME:.325 7T Chain Sprocket Clutch Drum fit for Stihl 021 023 025 MS230 MS250 Hf .325" 7T Clutch Cover Drum Replacement Fit for Stihl 021 023 025 MS230 MS250 Chainsaw SPECIFICATIONS.(Compatible With: Fit for Stihl 021 023 025 MS230 MS250 Chainsaw. Item included: 1 x Clutch Drum. 2) Perfect match for the original one. Size: approx. Manufacturer Part Number: 1123 640 2074, 11236402074.