Heavy-Duty Flat Idler / AYP 173901Pack Size:1AYP 173901NHC 276-9396, Oregon 173901, Oregon 78-053, Ratio Parts 22-952, Rotary 12661AYP 46" deck, 1999 and olderIdler E: 11/16 ", Idler F: 9/32 ", Idler H: 9/32 ", Idler K: 1 1/4 ", Idler V: 1 3/8 ", ID: 3/8 ", Material: Steel, For explanation of letters please refer to the drawing by clicking on More Info, Idler C: 3/8 ", Made By: An OEM supplier, OD: 4 3/8 ", Idler B: 3 3/4 ", Height: 1 3/8 ", Idler A: 4 3/8 "