40mm-Swivel-Caster-009 is a wheel caster, which is the shortcut of installing wheels on a hospital bed, or any objexct needed to be moved. This wheel caster has a wheel diameter of 40mm or 1.575" inch in inches. The wheel has a width of 40mm=1.575" inch. The overall height of the caster is 50mm or 1.969" inch. Mounted via a Top Plate that has the size of 38mm x 38mm and the holes distance of 129mm x 74mm. Rolling with a wheel core material of Polypropylene and a Polypropylene tire rolled over Roller bearing. Bearing in mind that every caster wheel has the load capacity of 55 lb with a Swivel type. Temperature range = -40 to 180 F. Remember, you will have to buy the 40mm-Swivel-Caster-009 in order to have it :).