Minimization of possible untoward effects on operator by installing VXB005150WC just ask your operator to push and pull, but not carry. The wheel diameter is 150mm or 5.906" inch in inches. Dimensions of the caster wheel is 50mm (1.969" inch). Overall height of the wheel caster is 190mm = 7.480" inch. Mounted via a Top Plate that has the size of 115mm x 100mm x 5.5mm and the holes distance of 72mm x 85mm. The weehl core material is Cast Iron and has a Cast Iron tire with a low friction Roller bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 661 lb with a Swivel type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB005150WC in order to get one :).