Premium Quality Cast Aluminum with Multi layers of Non-Stick Coating plus 1 layer of Marble Coating makes this wok totally non-stick・ Marble coating both inside and outside makes cleaning this pan the easiest ever.・ Marble coating is stronger than most other and last much， much longer・ Can be used with gas or electric cookers・ Eco Friendly and Healthier way to cook， absolutely no oil needed to fry/grill your favorite food.・ 32cm pan has helper handle