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 VXB20060GPPR. Dia. Measured of the caster wheel in metric standard 60mm which is equal to 2.362" inch with imperial units. The wheel has a width of 60mm=2.362" inch. The caster dimensions heightwise is 80mm/3.150" inch. Mounted via a Top Plate that has a size of 47mm x 47mm and the holes distance of 129mm x 74mm. The weehl core material is Polypropylene and has a Polypropylene tire with a low friction Roller 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 Swivel type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB20060GPPR in order to get one :).