Halifax or Vancouver our Low priced answert to the heavy weight objects movement, Wheel casters like our VXB004125PP will be rolling your machine or equipment back and forth. Dia. Measured of the caster wheel in metric standard 125mm which is equal to 4.921" inch with imperial units. The thickness of the wheel is 30mm or 1.181" inch. The height of the wheel caster is 155mm = 6.102" inch. Mounted via a Top Plate that has a size of 93mm x 62mm and the holes distance of 45mm x 72mm. The weehl core material is Polypropylene and has a Polypropylene tire with a low friction Double ball bearing. Maximum load calpacity that could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 220 lb with a Swivel type. The Temperature range is -40 to 180 F. Buy the VXB004125PP now, we ship on the same day.