Thousands of different kinds using our Canada based business to select from to have your office Desk/chair sliding easily right and left, install the VXB007075RBF. Wheel dia. is 75mm or 2.953" inch in inches. The thickness of the wheel is 21mm or .827" inch. The caster dimensions heightwise is 104mm/4.094" inch. Top Plate is the method of installing the caster to your equipment, dimensions are 100X59 with the holes distance of 81mm x 40mm. Low drag was achieved by a Grey rubber core on a Grey rubber tire spinning freely with a Plain bearing. Maximum load calpacity that could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 66 lb with a Fixed type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB007075RBF in order to get one :).