Heavy-Duty Flat Idler / John Deere AM124346Pack Size:1John Deere AM124346NHC 276-9495, Oregon 78-134John Deere X series, LT series, 737, 757, 777 and 797Idler E: 1/2 ", Idler F: 1/4 ", Idler H: 5/16 ", Idler K: 13/16 ", Idler V: 1 1/8 ", ID: 5/16 ", Material: Steel, For explanation of letters please refer to the drawing by clicking on More Info, Idler C: 5/16 ", Made By: An OEM supplier, OD: 3 7/8 ", Idler B: 3 ", Height: 3/4 ", Idler A: 3 7/8 "