Minimization of possible untoward effects on operator by installing VXB005200YGVCF just ask your operator to push and pull, but not carry. The wheel diameter is 200mm or 7.874" inch in inches. The thickness of the wheel is 50mm or 1.969" inch. Overall height of the wheel caster is 240mm = 9.449" inch. Mounted via a Top Plate that has the size of 100mm x 115mm and the holes distance of 75mm x 85mm. The weehl core material is Polypropylene core and Polyurethane and has a Polypropylene core and Polyurethane tire with a low friction Double ball beaing. Each caster will carry the load of 661 lb and is Fixed type. Environment temperature range is -40 to 180 F. Buy our VXB005200YGVCF, we wish all the best.