Heavy weight capability and Durability made the wheel casters like the VXB007B050VC a must use, get your do it yourself object move around. The wheel diameter is 50mm or 1.969" inch in inches. The thickness of the wheel is 25mm or .984" inch. The Caster with the wheel from end to end is 73mm = 2.874" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 70mm x 51mm with the holes distance of 53mm x 35mm. This caster wheel core material is Polyvinyl Chloride and has a Polyvinyl Chloride tire spinning over Ball bearing. Bearing in mind that every caster wheel has the load capacity of 55 lb with a Swivel type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB007B050VC in order to get one :).