Tens of thousands of different kinds to select from to have your office Desk/chair sliding easily right and left, install the VXB004075TPR1. Diameter size of the caster wheel has a metric standard 75mm which is equal to 2.953" inch with imperial units. The wheel has a width of 30mm=1.181" inch. The caster dimensions heightwise is 105mm/4.134" inch. Mounted via a Top Plate that has the size of 93mm x 62mm and the holes distance of 73mm x 45mm. The weehl core material is Thermoplastic Rubber and has a Thermoplastic Rubber tire with a low friction Ball bearing. Bearing in mind that every caster wheel has the load capacity of 176 lb with a Swivel type. Environment temperature range is -40 to 180 F. Very important notice, you need to buy the VXB004075TPR1 in order to get one :).