This is a A-60X24 Sprocket PN: 60X24Main Description As Following : A-60X24 Sprocket P.N: 60X24 Hub Required: XInside Diameter: 2"Outside Diameter: 6.147"Teeth: 24 Crossed From: WSS106024 , , 20006024 , , 20006024 , , 2827-42227 JOHN DAY , 3016-0240 , , 6713-54263 JOHN DAY , 673-S80602400 , , 673S80602400 , Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Sprockets, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Hub Required: X Inside Diameter: 2" Outside Diameter: 6.147" Teeth: 24