Specification Brand : Phoenix Mfg. BulletPoint1 : Outside Diameter: 4.12" BulletPoint2 : Inside Diameter: 1/2"|Multiple Bore Options BulletPoint3 : Flat Width: 0.875" BulletPoint4 : Width: 1.084" BulletPoint5 : Number of Flanges: 2 ExternallyAssignedProductIdentifier1 : 0744144831662 ExternallyAssignedProductIdentifier2 : 744144831662 ItemName : Phoenix Mfg. 3-1/2 Inch Flat Dia Flat Idler Pulley ItemShape : Round ItemTypeKeyword : idler-belt-pulleys Manufacturer : Phoenix Material : steel NumberOfItems : 1 PartNumber : 31561431 ProductDescription : This Flat Idler Pulley works both as an OEM replacement and as a general purpose pulley for power transmission such as compressors, industrial fans, lawn mowers, snowblowers, and electric motors. It comes with a bore adapter to bush down from 17mm to 1/2'' inside diameter. 31561431 features a heavy duty sealed radial single-row bearing.This part is Zinc-coated for long-term rust prevention. Additional Features: Made of Steel Flanges angled outward to help increase belt life Direct OEM Replacement for: Industrial Kinetics: 730001 SupplierDeclaredDgHzRegulation : not_applicable