Cook N Home Stainless Steamer Double Boiler 4-quart Set Mirror Polished Stainless Steel mirror polished exterior and interior Encapsulate bottom provide a even heat distribution. Riveted. Three (3) step 16/18/20cm insert fit different size pan range from 1-quart to 4-quarts Oven safe to 450 degrees Fahrenheit, glass lid not intend for oven use. 4-quart pot dimensions: 12 inches long x 8.5 inches wide x 5 inches high