Nonmarking Rubber Tread on Plastic Core Wheel, 350 lb Load Rating, 300 to 999 lb Load Rating Range, 5 in Wheel Dia., 1 1/4 in Wheel Width, Rubber Wheel/Tread Material, Soft, 75 Shore A, Precision Ball, Standard Tread Shape, 5/16 in For Axle Size, Not Included Includes Spanner Bushing, Plastic Wheel Core Material, Yes Non-Marking, 1 5/8 in Hub Length