This is a A-60X15 Sprocket PN: 60X15Main Description As Following : A-60X15 Sprocket P.N: 60X15 Hub Required: XInside Diameter: 2"Outside Diameter: 3.979"Teeth: 15 Replaces: PM20006015 SPROCKET/HUB/PULLEY/IDLER , 20006015 EDCOR , Crossed From: WSS106015 , , W20006015DS CASE-IH , 20006015 , , 20006015 , , 2827-41327 JOHN DAY , 3016-0231 , , 6713-53813 JOHN DAY , 673-S80601500 , , 673S80601500 , 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: 3.979" Teeth: 15