Flat Idler Kit / MTD 753-0518Pack Size:1MTD 753-0518NHC 276-9478, Rotary 10672MTD Self-propelled walk behindsIdler E: N/A ", Idler F: N/A ", Idler H: N/A ", Idler K: N/A ", Idler V: N/A ", ID: 3/8 ", Material: Plastic, Includes pressed bearing and shoulder bolt, 1/4"-20 THD, For explanation of letters please refer to the drawing by clicking on More Info, Idler C: 3 /8 ", OD: 1 3/4 ", Idler B: 1 1/2 ", Height: 1/2 ", Idler A: 1 3/4 "