Tens of thousands of different kinds to select from to have your office Desk/chair sliding easily right and left, install the VXB007B050PVCTB. And rolling on wheel that has 50mm diameter/1.969" inch. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 73mm/2.874" inch. is the method of installing the caster to your equipment, here are the dimensions 92mm x 65mm with the holes distance of 73mm x 45mm. The Ball bearing design will enable the Polyurethane tire to roll easily with a core made of Polyvinyl Chloride. Each caster will carry the load of 66 lb and is Swivel and Upper Brake type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB007B050PVCTB in order to get one :).