Heavy weight capability and Durability made the wheel casters like the VXB007050RBF a must use, get your do it yourself object move around. The wheel diameter is 50mm or 1.969" inch in inches. The wheel has a width of 16mm=.630" inch. The Caster with the wheel from end to end is 72mm = 2.835" inch. Mounted via a Top Plate that has the size of 65X50 and the holes distance of 45mm x 33mm. The Plain bearing design will enable the Grey rubber tire to roll easily with a core made of Grey rubber. Each caster will carry the load of 44 lb and is Fixed type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB007050RBF in order to get one :).