This is a A-PLW12 Pulley PN: PLW12Main Description As Following : A-PLW12 Pulley P.N: PLW12 This pulley can be used with either A or B width belts due to its dual groove / taper configuration.Hub Required: WOutside Diameter: 12" Crossed From: WSP1200W , , 21020120 , , 21020120 , , 2827-45127 JOHN DAY , 673-S85011500 , , 673S85011500 , 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: 12"