FLAT-FREE POLYURETHANE FOAM WHEEL, 350 LB LOAD RATING, SAWTOOTH TREAD, 10 1/2 IN WHEEL DIA., 3 IN WHEEL WIDTH, FOR AXLE SIZE 5/8 IN, 4.10/3.50-4, STANDARD TIRE RIM TYPE, OFFSET HUB POSITION, 2 1/4 IN HUB LENGTH, STEEL HUB MATERIAL, YES NON-MARKING