The Chef’s Secret Waterless Deep Stir Fry Skillet is built with durable T304 stainless steel construction. The steam control valve located on the lid allows for waterless cooking. Measures 11 inches wide x 9.75 inches deep. Directions for waterless cooking: Add a small amount of water to the bottom of the pan. Start on medium heat and cover the skillet with the control valve in the open position. Wait for the whistle to blow. When the whistle sounds, turn down the heat and close the steam control valve. The steam will continue to cook the food while the heat is turned off.