Wheel casters like the 4inch-Swivel-Caster-009 are used to roll your built machine or equipment back and forth. This caster is rolled on a wheel that has 100mm diameter/3.937" inch inches. The wheel has a width of 50mm=1.969" inch. The overall height of the caster is 150mm or 5.906" inch. Top Plate is the method of installing the caster to your equipment, the dimensions are 115mm x 100mm x 6mm with the holes distance of 72mm x 85mm. The caster core is made of Aluminium and Polyurethane and has a Aluminium and Polyurethane tire with a low friction Double ball beaing. Each caster will carry the load of 772 lb and is Swivel type. Last and not least the temperature range = -40 to 180 F. Buy the 4inch-Swivel-Caster-009 now, just add the quantity to basket and click on Checkout.