Caster Wheel, 200 lb Load Rating, 0 to 299 lb Load Rating Range, 3 in Wheel Dia., 1 1/4 in Wheel Width, Rubber Wheel/Tread Material, Soft, 85 Shore A, Delrin, Standard Tread Shape, 3/8 in For Axle Size, Not Included Includes Spanner Bushing, Plastic Wheel Core Material, No Non-Marking, 1 9/16 in Hub Length Nonmarking wheels with a rubber tread and plastic core will not leave marks on floor surfaces. They are used in indoor facilities that must maintain an attractive floor appearance. The casters' plastic core is lighter and provides better corrosion resistance than a metal core. Nonmarking rubber tread on plastic core wheels are used on carts, racks, and similar equipment in a range of institutional and industrial applications.Wheels with rubber treads are suitable for most types of floori.