Minimization of possible untoward effects on operator by installing VXB005125BAPUB1 just ask your operator to push and pull, but not carry. And rolling on wheel that has 125mm diameter/4.921" inch. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 164mm/6.457" inch. Mounted via a Top Plate that has the size of 115mm x 100mm and the holes distance of 72mm x 85mm. The Double ball beaing design will enable the Aluminum and Polyurethane tire to roll easily with a core made of Aluminum and Polyurethane. Each caster will carry the load of 772 lb and is Side Brake type. The caster temperature range = -40 to 180 F. Buy our VXB005125BAPUB1, we wish all the best.