Specification Brand : Phoenix Mfg. BulletPoint1 : Outside Diameter: 4.53" BulletPoint2 : Inside Diameter: 3/8"|Multiple Bore Options BulletPoint3 : Flat Width: 0.75" BulletPoint4 : Width: 1.2" BulletPoint5 : Number of Flanges: 2 ExternallyAssignedProductIdentifier1 : 0744144335061 ExternallyAssignedProductIdentifier2 : 744144335061 ItemName : Phoenix Mfg. 3-3/4 Inch Flat Dia Flat Idler Pulley Replacement for Husqvarna Craftsman 173981 ItemTypeKeyword : lawn-mower-pulleys Manufacturer : Phoenix Material : steel NumberOfItems : 1 PartNumber : 31375075 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 3/8'' inside diameter. 31375075 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: Craftsman Husqvarna AYP: 173981 UnspscCode : 26111800