This is a A-60X19 Sprocket PN: 60X19Main Description As Following : A-60X19 Sprocket P.N: 60X19 Hub Required: XInside Diameter: 2"Outside Diameter: 4.945"Teeth: 19 Crossed From: WSS106019 , , 20006019 , , 20006019 , , 2827-41727 JOHN DAY , 3016-0235 , , 6713-54013 JOHN DAY , 673-S80601900 , , 673S80601900 , 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: 4.945" Teeth: 19