Heavy weight capability and Durability made the wheel casters like the VXB007075TPRB1 a must use, get your do it yourself object move around. The wheel diameter is 75mm or 2.953" inch in inches. The wheel has a width of 21mm=.827" inch. Overall height of the wheel caster is 93mm = 3.661" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 65mm x 54mm with the holes distance of 51mm x 38mm. This caster wheel core material is Thermoplastic Rubber and has a Thermoplastic Rubber tire spinning over Plain bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 121 lb with a Swivel and Center Brake type. Environment temperature range is -40 to 180 F. Very important notice, you need to buy the VXB007075TPRB1 in order to get one :).