Material - Made of heavy duty stainless steel. sturdy and durable, easy to clean, dishwasher safe. Rack Size - 2 pack of egg steamer rack, this set including 1pc 6.9*2.2 Inch steamer, and other higher one, which is 6.9*3.15 inch. The 7 circle holes is 1.5\'/4cm in diameter. Multifunctional Use: Steaming hard boiled eggs, they stay put and don\'t roll around, conveniently cooks 1 to 7 eggs in a few minutes;Also convenient to cook other things with a plate,such as,potatoes,fish,crab,veggies,dumpling. Suitable: Fits 5, 6 & 8 quart cooker - this stainless steel rack cooker insert is a must have kitchen accessory for the pots, pans or other cookware, whose diameter is 7\" at least. Note: They are not stacked so it will be impossible to use both of them at the same time in the same pressure cooker.