Whatever you are building needed to be on wheels, here come the 8inch-Caster-015. Diameter of the caster wheel is a metric standard 200mm that is equal to 7.874" inch with imperial units. Dimensions of the caster wheel is 50mm (1.969" inch). The overall height of the caster is 240mm or 9.449" inch. Mounted via a Top Plate that has the size of 100mm x 115mm and the holes distance of 75mm x 85mm. Low drag was achieved by a Polypropylene core on a Polypropylene tire spinning freely with a Double ball beaing. Each caster will carry the load of 661 lb and is Fixed type. Last and not least the temperature range = -40 to 180 F. Enjoy our 8inch-Caster-015, we wish all the best in your project.