Double walled in construction, Complete made of Stainless Steel [ 22 swg. ]. Lid supplied with holes of 3” dia. Gap between the walls filled with high insulation glaswool. Thermostatically controlled. ISI marked Immersion heater of 1000 W/230 V is provided. Temperature Range from Ambient to 100°c. Electrically operated on 230 V AC 50 Hz. Supply.