The 4.5L Ultra duracook pressure cooker is made of food-grade AISI 304 stainless steel, so healthy food won't rust. The high-impact bonded three-layer composite base facilitates uniform cooking without burning or charring by distributing heat evenly throughout the bottom. In addition, the cooking time is significantly shorter than in other standard cookers. The double-screwed, heat-resistant, heavy, solid bakelite handles keep the handles in place. Upgrade to an Ultra duracook stainless steel pressure cooker for its durability, fast cooking, and health benefits.