Description: Heavy duty, high speed bearing idler pulley. Made of steel  Replaces OEM Part Number (Please me sure of your OEM part number before purchase): AM103019 3020-047-MI 20613, 420613, 420613MA 165-107 7-05310 280-127, 280-339  Specs: Outer Diameter: 3 1/16 in Bore: 0.669 in Type: Steel Volume: 17.13 in³ Product UOM: Each Weight (with Packaging): 0.36 Lb Product Width: 5/8 in