Heavy weight capability and Durability made the wheel casters like the VXB013125BCPUS a must use, get your do it yourself object move around. The wheel diameter is 125mm or 4.921" inch in inches. Dimensions of the caster wheel is 32mm (1.260" inch). The caster dimensions heightwise is 163mm/6.417" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 95mm x 70mm with the holes distance of 75mm x 52mm. The weehl core material is Polyurethane and has a Polyurethane tire with a low friction Ball bearing. Bearing in mind that every caster wheel has the load capacity of 220 lb with a Swivel type. Environment temperature range is -40 to 180 F. Very important notice, you need to buy the VXB013125BCPUS in order to get one :).