The Imusa tamale steamer set includes one each 20, 24, 32, 40 and 50 quart size. They are of aluminum construction and are durable and long lasting. Each steamer has a steam rack for cooking and steaming seafood, vegetables and tamales. When removing the rack, makes an ideal stock pot for soups, stews, gumbo and chili. The thick handles make for easy handling. We recommend to handwash with warm soapy water.