These hot plate are specially designed for Industrial purposes and are controlled, by three heat switch/energy regulator can be closely set to any desired temperature between 50⁰ C-350⁰ C. The 7.2" to 7.6" diameter approx. Hot plate is recessed in a streamlined rectagular mild steel casing with hammertone painted from outside. An indicator lamp shows that the thermostat is in operation.Suitable for operation on 230 volts ACmains.