SPROCKET FOR POWER SAWS COMPATIBLE WITH MODEL: 450 550 SUPER XL 925 (with 6 shoe clutch) XL (800-924 series) XL 12 (after S/N 1735838) XL AUTO ˜ INNER BELL: 78.5mm ˜ BORE: 19 mm TOTAL HEIGHT: 31mm 3/8" 7 TEETH roller cage: 11807 HOMELITE CODE: 30681X ORIGINAL CODE: AT