Minimization of possible untoward effects on operator by installing VXB005150ACPU just ask your operator to push and pull, but not carry. And rolling on wheel that has 150mm diameter/5.906" inch. The thickness of the wheel is 50mm or 1.969" inch. Overall height of the wheel caster is 193mm = 7.598" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 100mm x 115mm and holes distance of 75mm x 85mm. Low drag was achieved by a Iron core and Polyurethane core on a Iron core and Polyurethane tire spinning freely with a Double ball beaing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 772 lb with a Swivel+Brake+Fixed type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB005150ACPU in order to get one :).