5inch-Lock-Caster-002 is a wheel caster, which is the shortcut of installing wheels on a hospital bed, or any objexct needed to be moved. This caster is rolled on a wheel that has 125mm diameter/4.921" inch inches. The thickness of the wheel is 50mm or 1.969" inch. The Caster with the wheel from end to end is 167mm = 6.575" inch. Mounted via a Top Plate that has the size of 100mm x 115mm and the holes distance of 75mm x 85mm. Low drag was achieved by a Polyurethane core on a Polyurethane tire spinning freely with a Double ball beaing. Each caster will carry the load of 507 lb and is Side Locking type. Temperature range = -40 to 180 F. Remember, you will have to buy the 5inch-Lock-Caster-002 in order to have it :).