SPROCKET FOR POWER SAWS COMPATIBLE WITH MODEL: 50 51 55 55 RANCHER 154 254 BEFORE S/N 345-0001 262 BEFORE S/N 345-0001 BELL INDEX: 68.5mm BORE: 16 mm TOTAL HEIGHT: 26mm .325" 7 TEETH roller cage: 11893 self-aligning ring: 11892 HUSQVARNA CODE: 29175X ORIGINAL CODE: AT