SPROCKET FOR POWER SAWS COMPATIBLE WITH MODELS: 405 406 407 410 415 416 440 446 450 451 480 485 YB501 YB601 YB701 .325" 7 TEETH INNER HOOK: 67.7mm Bore diameter: 13mm Overall height: 32mm SELF-ALLINATING RING: ROLLER CAGE: SHINDAIWA CODE: R370377 ORIGINAL CODE: AT