Low cost solution to the heavy weight objects movement, Wheel casters like our VXB0045125PUB are used to roll your machine or equipment back and forth. The wheel diameter is 125mm or 4.921" inch in inches. Dimensions of the caster wheel is 40mm (1.575" inch). The Caster with the wheel from end to end is 165mm = 6.496" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 110mm x 100mm x 4mm fork:3.5mm with the holes distance of 85mm x 75mm. The ball bearing design will enable the Polyurethane and Polypropylene tire to roll easily with a core made of Polyurethane and Polypropylene. Bearing in mind that every caster wheel has the load capacity of 661 lb with a Swivel and Upper Brake type. Environment temperature range is -40 to 180 F. Very important notice, you need to buy the VXB0045125PUB in order to get one :).