Low cost solution to the heavy weight objects movement, Wheel casters like our VXB005125BLTPRF are used to roll your machine or equipment back and forth. And rolling on wheel that has 125mm diameter/4.921" inch. Dimensions of the caster wheel is 50mm (1.969" inch). The Caster with the wheel from end to end is 167mm = 6.575" inch. Mounted via a Top Plate that has the size of 100mm x 115mm and the holes distance of 75mm x 85mm. The weehl core material is Thermoplastic Rubber and has a Thermoplastic Rubber tire with a low friction Double ball beaing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 507 lb with a Fixed type. Temperature range is -40 to 180 F. Buy our VXB005125BLTPRF, we wish all the best.