This is a A-40X29 Sprocket PN: 40X29Main Description As Following : A-40X29 Sprocket P.N: 40X29 Hub Required: XInside Diameter: 2"Outside Diameter: 4.898"Teeth: 29 Crossed From: 20004029 , , 20004029 , , 3016-0157 , , 6713-50663 JOHN DAY Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Sprockets, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada