Minimization of possible untoward effects on operator by installing VXB007050TPRT just ask your operator to push and pull, but not carry. The wheel diameter is 50mm or 1.969" inch in inches. The thickness of the wheel is 17mm or .669" inch. The caster dimensions heightwise is 65mm/2.559" inch. This wheel caster can be mounted using a Threaded Stem with the dimensions of 65mm x 54mm and holes distance of 51mm x 38mm. This caster wheel core material is Thermoplastic Rubber and has a Thermoplastic Rubber tire spinning over 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. Environment temperature range is -40 to 180 F. Very important notice, you need to buy the VXB007050TPRT in order to get one :).