Laboratory Hot Plates of 20.5 cms. diameter cast iron machined to a smooth and levelled surface is fitted on a robust mild steel white enamelled body. Provided with a three heat control switch and indicating lamp. Maximum surface temperature 350 c. For use on 230 volts 50 Hz A.C. single phase . The heat control switch gives 350 watts,650 watts and 1K.Watt Fitted with continuously variable Energy Regulator Control.