Minimization of possible untoward effects on operator by installing VXB007050PVC just ask your operator to push and pull, but not carry. The wheel diameter is 50mm or 1.969" inch in inches. The wheel has a width of 17mm=.669" inch. Overall height of the wheel caster is 69mm = 2.717" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 50mm x 50mm and holes distance of 36mm x 36mm. Low drag was achieved by a Polyvinyl Chloride core on a Polyvinyl Chloride tire spinning freely with a Plain bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 44 lb with a Swivel type. The caster temperature range = -40 to 180 F. Buy our VXB007050PVC, we wish all the best.