Marble coated Cast Aluminium. KW Brand 12 Inch Fry Pan. Non Stick Healthy and Durable. Easy Grip Stay Cool HandleMade in Korea, NOT CHINA. Korea is very advanced in its nonotechnology which is essential in the manufacturing process of this marble-coated panDurastone Marble Series.Premium Quality Cast Aluminium with 4 layers of Non-Stick Marble Coating making this truly the first and the very best really non-stick pan ever.Marble coating is 10x stronger than teflon and last much, much longer