Tens of thousands of different kinds to select from to have your office Desk/chair sliding easily right and left, install the VXB004075RBF. And rolling on wheel that has 75mm diameter/2.953" inch. The thickness of the wheel is 35mm or 1.378" inch. The Caster with the wheel from end to end is 105mm = 4.134" inch. Mounted via a Top Plate that has the size of 93mm x 62mm and the holes distance of 45mm x 72mm. The Ball bearing design will enable the Rubber tire to roll easily with a core made of Rubber. Bearing in mind that every caster wheel has the load capacity of 132 lb with a Rigid type. Environment temperature range is -40 to 180 F. Very important notice, you need to buy the VXB004075RBF in order to get one :).