Efficient VXB005150GBL makes it feasible to pull and push items instead of transport Spinning on wheel that has 150mm diameter/5.906" inch. Sizes of the caster wheel is 53mm (2.087" inch). The Caster with the wheel from end to end is 195mm = 7.677" inch. Mounted via a Top Plate that has a size of 100mm x 115mm and the holes distance of 75mm x 85mm. The Double ball beaing design will enable the Polypropylene core and Rubber tire to roll easily with a core made of Polypropylene core and Rubber. Maximum load calpacity that could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 551 lb with a Swivel type. The Temperature range is -40 to 180 F. FYI, you will need to buy the VXB005150GBL in order to get one :).