SPROCKET FOR POWER SAWS COMPATIBLE WITH MODELS: 017 018 019 021 023 025 MS210 MS230 MS250 MS250C .325" 7 TEETH INNER BOWL: 66mm Bore diameter: 13mm Overall height: 27.5mm SELF-ALLINING RING: ROLLER CAGE: 37325 STIHL CODE: 106657X ORIGINAL CODE: AT