Low cost solution to the heavy weight objects movement, Wheel casters like our VXB005100GBLB1 are used to roll your machine or equipment back and forth. And rolling on wheel that has 100mm diameter/3.937" inch. The wheel has a width of 53mm=2.087" inch. The Caster with the wheel from end to end is 142mm = 5.591" inch. Mounted via a Top Plate that has the size of 100mm x 115mm and the holes distance of 75mm x 85mm. Low drag was achieved by a Polypropylene core and Rubber core on a Polypropylene core and Rubber tire spinning freely with a Double ball beaing. Bearing in mind that every caster wheel has the load capacity of 441 lb with a Swivel and Center Brake type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB005100GBLB1 in order to get one :).