Revvo swivel stem casters are designed to facilitate smooth movement even around tight corners. They can be easily fitted on to rolling ladders, industrial cabinets, hospital beds and shopping carts. They feature a threaded stem, nylon or polyurethane wheel construction, ball or roller bearings and a maximum load rating of 275 lb. These Revvco casters can operate at temperatures ranging between 20 and 176 degrees Fahrenheit and are available in different overall heights, wheel diameters, thread sizes and stem diameters.