This is a A-50V10 Sprocket PN: 50V10Main Description As Following : A-50V10 Sprocket P.N: 50V10 Hub Required: VInside Diameter: 1 1/8"Outside Diameter: 2.299"Teeth: 10 Crossed From: WSS105010 , , 20005010 , , 20005010 , , 2827-39027 JOHN DAY , 3016-0181 , , 6713-51363 JOHN DAY , 673-S80501000 , , 673S80501000 , Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Sprockets, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Hub Required: V Inside Diameter: 1 1/8" Outside Diameter: 2.299" Teeth: 10