Poong Nyun Commercial Pressure Cooker 11L/20 Cups: 20 cup Hand/gravity-casted body and lid with melted aluminum Meant for commercial use 4-step safety device Over 7mm thickness bottom Poong Nyuns Commercial pressure cookers are gravity casted pressure cookers specifically made to cook large servings of good. The commercial pressure cookers have a three-ply base that helps transfer heat at a faster rate and allows the pressure cooker to have higher durability. The gravity casted method prevents food from burning, scorching, or sticking to the base of the pressure cooker. Poong Nyuns commercial pressure cookers come with five safety devices and handle safety device to protect its user. The sleek design and diverse functionality of this pressure cooker makes it a perfect fit for every household.