Durable stainless steel tank has double-walled insulation. Features an automatic thermostat control and hospital grade power cord. Includes 18 lbs of ready-to-use paraffin. Outside measures 21" x 13" x 8½" (53 x 33 x 21.6 cm) Inside measures 19¾" x 11½" x 6" (50 x 29 x 15 cm). Latex free.