made of outer ms sheet duly powder coated and inner made of ss sheet . The temp is maintained by a programmable micro processor controller, temp range + 37°c to 56°c, +/-0. 5°c with audio visual alarm for low & high temp. Mechanism of thawing is by pumping with high capacity pump and maintain temp of water by heater with sealed sensor dipped directly in water. Removable type s. S tray with partition for holding 12 bags. Foldable lid with outer s. S and inner plastic with two handles. The whole unit is to work on 230v, 50hz.