VXB007050 is a device building a wheel that's connected to the base of a huge object like a trailers, your home furniture, even your truck to transfer the item more quickly and readily. them.You need {Item Name} to have your office desk, equipment or even a machine to easily roll them around. Dia. Measured of the caster wheel in metric standard 50mm which is equal to 1.969" inch with imperial units. Sizes of the caster wheel is 22mm (.866" inch). The caster dimensions heightwise is 65mm/2.559" inch. Mounted via a Top Plate that has a size of 58mm x 48mm and the holes distance of 46mm x 35mm. The weehl core material is Rubber and has a Rubber tire with a low friction Delrin bearing. Maximum load calpacity that could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 55 lb with a Swivel type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB007050 in order to get one :).