Flat belt idler pulley made from fiberglass reinforced nylon. Fits 0.75" flat belt. Uses 6203-ZZ shielded bearing with a 17mm bore. Crown height is 0.016".
NOTE: THE FLANGES ON THESE PULLEYS WERE MACHINED DOWN TO 1/8" HIGH. The OD is now roughly 3.25". Uses 6203-ZZ shielded bearings.