Polyurethane Tread On Plastic Core Wheel, 750 Lb Load Rating, 300 To 999 Lb Load Rating Range, 5 In Wheel Dia., 2 In Wheel Width, Polyurethane Wheel/Tread Material, Firm, 92 Shore A, Roller, Standard Tread Shape, 3/4 In For Axle Size, No Includes Spanner Bushing, Plastic Wheel Core Material, Yes Non-Marking, 3 1/4 In Hub Length