DOP34-046ACS AYP / Craftsman / Sears Flat Idler Pulley. For drive belt and mower deck on many 12 through 22 HP front engine tractors. Size: 3-7/8" OD, 3-1/16" Flat OD, 3/4" Flat Width, Overall Width: 1", 3/8" Bore . Replaces # 173438, 104360X & 131494.