The Copper Chef Stackable Steamer Pan Extender Ring & Tray is a two-piece set designed for use with all stove types, including electric and gas. Made of metal with a silver color and a non-stick stainless steel surface coating, this square-shaped steamer pan features a 11-inch diameter and a 1 qt capacity. With a heat resistance of 450°F, this stackable steamer pan is perfect for cooking a variety of dishes efficiently and easily.