Electric models Tops of baths include sets of concentric rings of varying sizes and special sleeves for thermometer insertion Consists of a tubular heater, hydraulic thermostat, pilot light, draincock and a water level regulator (not recommended for high temperature oil bath use) …

Of stainless steel with flat bottom rounded at edges, beaded reinforcing rim, steam vent, riveted handles and set of seven concentric rings including central cover with handle The outside ring has the edge turned down to fit over rim of bath. Diameter of smallest opening is 25 mm. Outside…