This is a A-PLW11 Pulley PN: PLW11Main Description As Following : A-PLW11 Pulley P.N: PLW11 This pulley can be used with either A or B width belts due to its dual groove / taper configuration.Hub Required: WOutside Diameter: 11" Crossed From: WSP1100W , , 21020110 , , 21020110 , , 2827-45027 JOHN DAY , 673-S85011400 , , 673S85011400 , Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Pulleys, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : This pulley can be used with either A or B width belts due to its dual groove / taper configuration. Hub Required: W Outside Diameter: 11"