Polyurethane Tread on Iron Core Wheel, 450 lb Load Rating, 300 to 999 lb Load Rating Range, 5 in Wheel Dia., 1 1/4 in Wheel Width, Polyurethane Wheel/Tread Material, Firm, 87 Shore A, Precision Ball, Standard Tread Shape, 3/8 in For Axle Size, Not...