Flat Idler / Hustler 794404Pack Size:1Hustler 794404NHC 276-9492, Rotary 12299Hustler Mini Fastrack and Mini ZIdler E: N/A ", Idler F: N/A ", Idler H: N/A ", Idler K: 1 ", Idler V: 1 1/8 ", ID: 11/16 ", Material: Black Plastic, For explanation of letters please refer to the drawing by clicking on More Info, Idler C: 11/16 ", OD: 4 ", Idler B: 3 ", Height: 1 1/8 ", Idler A: 4 "