Little or minimum effort can be possible on your operator by installing VXB005150FP just ask your operator to push and pull, but not carry. Dia. Measured of the caster wheel in metric standard 150mm which is equal to 5.906" inch with imperial units. The thickness of the wheel is 45mm or 1.772" inch. The height of the wheel caster is 191mm = 7.520" inch. Mounted via a Top Plate that has a size of 100mm x 115mm and the holes distance of 75mm x 85mm. Low drag was achieved by a co-polypropylene core on a co-polypropylene tire spinning freely with a Double ball beaing. Having in mind that every caster wheel has the load capacity of 661 lb with a Swivel type. Ambient temperature range is -40 to 180 F. Buy the VXB005150FP now, we ship on the same day.