This is a A-50X44 Sprocket PN: 50X44Main Description As Following : A-50X44 Sprocket P.N: 50X44 Hub Required: XInside Diameter: 2"Outside Diameter: 9.114"Teeth: 44 Crossed From: WSS105044 , , 3016-0215 , , 6713-53063 JOHN DAY 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: 9.114" Teeth: 44