Heavy weight capability and Durability made the wheel casters like the VXB005150BCF a must use, get your do it yourself object move around from our Toronto biz. Spinning on wheel that has 150mm diameter/5.906" inch. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 193mm/7.598" inch. Top Plate is the method of installing the caster to your equipment, dimensions are 100mm x 115mm with the holes distance of 75mm x 85mm. The Roller bearing design will enable the Black Cast iron tire to roll easily with a core made of Black Cast iron. Each caster wheel will carry the load of 617 lb and is Fixed type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB005150BCF in order to get one :).