Wheel casters like the 8inch-Caster-005 are used to roll your built machine or equipment back and forth. 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 caster dimensions heightwise is 240mm/9.449" inch. Top Plate is the method of installing the caster to your equipment, the dimensions are 100mm x 115mm with the holes distance of 75mm x 85mm. The Double ball beaing design will enable the Polyvinyl Chloride tire to roll easily with a core made of Polyvinyl Chloride. Each caster will carry the load of 661 lb and is Fixed type. The temperature range is -40 to 180 F. Enjoy our 8inch-Caster-005, we wish all the best in your project.