Specification Brand : Farmer Bob's Parts BulletPoint1 : 5" OD Weldable Pulley fits - A Belts (0.50 W") & B Belts (0.66" W) Groove for W-Series Hub. Weld 4-1/2’’ diameter and smaller on both sides. BulletPoint2 : 00720050, 21020050, 971-21020050, WSP500W BulletPoint3 : W Series Color : Black ExternallyAssignedProductIdentifier1 : 0767908213528 ExternallyAssignedProductIdentifier2 : 767908213528 ItemName : 5" OD Weld-A-Pulley Fits A (0.50 W") & B Belts (0.66" W) (Hub Sold Separately) Farmer Bob's Parts WSP500W ItemPackageQuantity : 1 ItemTypeKeyword : v-belt-pulleys Manufacturer : Farmer Bob's Parts Material : Steel NumberOfItems : 1 PartNumber : WSP500W ProductDescription : 5" OD Weldable Pulley fits - A Belts (0.50 W") & B Belts (0.66" W) Groove for W-Series Hub. Weld 4-1/2’’ diameter and smaller on both sides ProductSiteLaunchDate : 2018-12-13T20:29:07.056Z UnitCount : 1