Tens of thousands of different kinds to select from to have your office Desk/chair sliding easily right and left, install the VXB005100FP. And rolling on wheel that has 100mm diameter/3.937" inch. Dimensions of the caster wheel is 45mm (1.772" inch). The Caster with the wheel from end to end is 145mm = 5.709" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 100mm x 115mm with the holes distance of 75mm x 85mm. The weehl core material is co-polypropylene and has a co-polypropylene tire with a low friction Double ball beaing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 551 lb with a Swivel type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB005100FP in order to get one :).