Winco SSDB-20S, 20-Quart 11-7/8" x 10- 5/8" x 11-7/16" Commercial Grade Stainless Steel Steamer and Pasta Cooker With Cover, Double Boiler with Lid, NSF will be an extremely useful addition to your cookware collection. The commercial quality 20-quart steamer and pasta cooker includes an outside water pot, a perforated insert to be used as a pasta cooker, a steamer and a matching cover for better heat retention. The 18-8 stainless steel construction with aluminum core provides even and thorough heat distribution to make cooking fast and enjoyable.