Minimization of possible untoward effects on operator by installing VXB004125PVCB just ask your operator to push and pull, but not carry. Diameter size of the caster wheel has a metric standard 125mm which is equal to 4.921" inch with imperial units. The wheel has a width of 30mm=1.181" inch. The caster dimensions heightwise is 155mm/6.102" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 93mm x 62mm with the holes distance of 73mm x 45mm. The weehl core material is Polyvinyl Chloride and has a Polyvinyl Chloride tire with a low friction Double ball bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 220 lb with a Swivel and Upper Brake type. Temperature range is -40 to 180 F. Buy our VXB004125PVCB, we wish all the best.