Tens of thousands of different kinds to select from to have your office Desk/chair sliding easily right and left, install the VXB20075GPPTB. The wheel diameter is 75mm or 2.953" inch in inches. Dimensions of the caster wheel is 75mm (2.953" inch). Overall height of the wheel caster is 100mm = 3.937" inch. is the method of installing the caster to your equipment, here are the dimensions 47mm x 47mm with the holes distance of 129mm x 74mm. This caster wheel core material is Polypropylene and has a Polypropylene tire spinning over Roller bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 88 lb with a Swivel and Upper Brake type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB20075GPPTB in order to get one :).