Single Wall, Provided with Concentric Rings, Inner Chamber of S.S. Great for evaporating liquids like alcohol or for melting solids such as agar. Concentric rings can be removed to accommodate containers of various sizes. Single walled chamber made of Stainless Steel. The concentric rings are chrome plated. Supplied complete with two indicator lamps, concentric rings, ON/OFF Switch, Cord & Plug but without thermometer. Suitable to operate on 220V, 1ph, 50 Hz, AC supply.