2inch-Lock-Swivel-Caster-020 is a wheel caster, which is the shortcut of installing wheels on a hospital bed, or any objexct needed to be moved. Diameter of the caster wheel is a metric standard 50mm that is equal to 1.969" inch with imperial units. The thickness of the wheel is 30.5mm or 1.201" inch. The caster dimensions heightwise is 68mm/2.677" inch. Mounted via a Top Plate that has the size of 71mm x 54mm and the holes distance of 54mm x 36mm. The caster core is made of Nylon and has a Nylon tire with a low friction Ball bearing. Here come the maximum load that should be applied on every wheel, remember to add safety factor, when calculating the load capacity 220 lb with a Swivel and Upper Locking type. Temperature range = -40 to 180 F. Remember, you will have to buy the 2inch-Lock-Swivel-Caster-020 in order to have it :).