The Thunder Group ALST001 Steamer Basket/Boiler Set features a durable aluminum construction designed for efficient steaming. With a diameter of 11-3/8 inches and a height of 12-1/2 inches, this set includes two perforated stacks, a bottom, and a cover. The 1/16-inch perforations allow for optimal steam circulation, ensuring even cooking and enhanced flavor retention. Ideal for preparing vegetables, seafood, and dumplings, this versatile steamer set is perfect for both home and commercial kitchens.