Made of 6 layers of hard oxidized aluminum alloy, it is sturdy and , energy saving and more delicious. Gathering heat conduction, rapid pressure, rapid heat conduction, more uniform heating, rapid tumbling, locking nutrition. Safety protection design, pressure relief is more secure. The exhaust valve is designed to automatically close the safety valve during normal and automatically relieve pressure when overpressure, which will not exceed the safe range. Premium Thickened Stainless Steel Construction – Crafted from high-quality, food-grade stainless steel for superior durability, rust resistance, and even heat distribution, ensuring long-lasting performance in daily kitchen use.