6inch-Swivel-Caster-015 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 150mm diameter/5.906" inch inches. The wheel has a width of 50mm=1.969" inch. The overall height of the caster is 195mm or 7.677" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 100mm x 115mm and holes distance of 75mm x 85mm. Low drag was achieved by a Polypropylene core and Thermoplastic Rubber core on a Polypropylene core and Thermoplastic Rubber tire spinning freely with a Double ball beaing. Each caster will carry the load of 617 lb and is Swivel type. Last and not least the temperature range = -40 to 180 F. Remember, you will have to buy the 6inch-Swivel-Caster-015 in order to have it :).