This Cookware is Made from Heavy Gauge Aluminium Used for High Efficiency While Cooking Bottom of This Pan Insures Heating on All 4 Compartments While Cooking Made From Pure Garde Aluminium Black Colour With 4 Cavity Can Cook 4 Uttapam at a Time 3 mm 100 Virgin aluminium ensures even heat distribution which ensures the food does not burn This Cookware is Compatible with Gas Stove Only