VXB005150CRF is a device building a wheel that's connected to the base of a huge object like a trailers, your home furniture, even your truck to transfer the item more quickly and readily. them.You need {Item Name} to have your office desk, equipment or even a machine to easily roll them around. Dia. Measured of the caster wheel in metric standard 150mm which is equal to 5.906" inch with imperial units. Sizes of the caster wheel is 50mm (1.969" 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. Low drag was achieved by a Rubber core on a Rubber tire spinning freely with a Roller bearing. Having in mind that every caster wheel has the load capacity of 617 lb with a Fixed type. Ambient temperature range is -40 to 180 F. FYI, you will need to buy the VXB005150CRF in order to get one :).