12 Packs 1.8" Nylon Garage Door Rollers for 2" Track, 7" Stem Garage Door Wheels, 6200zz Bearing 8 Balls, Blue

Material: Nylon, Bearing Steel Bearing Balls: 8 Balls Wheel Diameter: 1.8" (46mm) Shank Length: 7" (178mm) Fit all 2" tracks