Buffalo Function Series 40cm Round Bottom Wok has better heat conduction, lighter in weight, innovative "Thickness Varied" design, and a perfect thickness of 3.2mm. Buffalo is 25% lighter than traditional 5-ply cookware and yet 30% more efficient in heat conduction. Whether you stir fry, boil, pan fry, or deep fry, low heat achieves high temperature, significantly reducing smoke and saving energy. It is manufactured with the highest quality steel, using a special manufacturing process - absolutely no harmful materials used! Heat radiates evenly and efficiently, making the entire pot hot quickly. High heat conductivity technology saves money and energy. Also, no chemical coating is applied - use with peace of mind.