Utilizing VXB20050CPUT3B makes it feasible to pull and push items instead of transport The wheel diameter is 50mm or 1.969" inch in inches. Dimensions of the caster wheel is 50mm (1.969" inch). The caster dimensions heightwise is 48mm/1.890" inch. Mounted via a that has the size of 38mm x 38mm and the holes distance of 129mm x 74mm. The weehl core material is Nylon and Polyvinyl Chloride and has a Nylon and Polyvinyl Chloride tire with a low friction Roller bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 55 lb with a Swivel and Upper Brake type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB20050CPUT3B in order to get one :).