Gardening 7T Clutch Cover Drum Chain Sprocket Rim Chainsaw ReplacementSpecification:Material: alloyDimensions: 7x3cm \/ 2.76x1.18(D*H)Teeth quantity: 7 teethApplication: for Stihl 021 023 025 MS230 MS250 (CLUTCH DRUM .325 "-7 + Needle Bearing)Package Contents:1 x Alloy Sprocket