This is a A-40X35 Sprocket PN: 40X35Main Description As Following : A-40X35 Sprocket P.N: 40X35 Hub Required: XInside Diameter: 2"Outside Diameter: 5.856"Teeth: 35 Crossed From: WSS104035 , , 20004035 , , 20004035 , , 3016-0163 , , 971-20004035 , , 97120004035 , 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: 5.856" Teeth: 35