Rubber On Iron Caster,300mm caster wheels,extra duty caster wheels Material:Rubber Tire,Iron Caster Hub Size Available: 12" x 3" Loading Capacity: 1500 kg Widely used as movable racks caster, conveyor caster, utility trucks caster, storage racks caster, scaffold caster, foot stand caster www.casterwheelsco.com ; [email protected]