This is a A-PLW9 Pulley PN: PLW9Main Description As Following : A-PLW9 Pulley P.N: PLW9 This pulley can be used with either A or B width belts due to its dual groove / taper configuration.Hub Required: WOutside Diameter: 9" Crossed From: WSP900W , , 21020090 , , 21020090 , , 2827-44827 JOHN DAY , 673-S85011200 , , 673S85011200 , 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: 9"