GRIP 8" x 2" scaffold caster wheels set of 4 1 3/8" tube size A Set of Four Brand New Double Heavy Duty 8" Rubber Caster Wheel Have two Locking holes for compatible at 2" and 2 1/2" Scaffold Frames Swivel 360 degree Equipped with step scaffold wheel locking double brakes and greaseable bearings Loading Capacity 800 Lbs