This is a A-PLW10 Pulley PN: PLW10Main Description As Following : A-PLW10 Pulley P.N: PLW10 This pulley can be used with either A or B width belts due to its dual groove / taper configuration.Hub Required: WOutside Diameter: 10" Crossed From: WSP1000W , , 21020100 , , 21020100 , , 2827-44927 JOHN DAY , 673-S85011300 , , 673S85011300 , 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: 10"