Marathon 10" Swivel Caster with Flat Free Tire 4.10/3.50-4" tire mounted on a swivel caster. 10" Tire Diameter. 12" overall height from mounting bracket to edge of tire. Flat Free Tire made of solid, polyurethane foam. Non-marking. Sawtooth Tread. Caster plate dimensions 4.0" x 4.5" Perfect caster for small equipment, carts, etc. 300 lb load capacity. Not for highway use.