Cast Aluminum Pressure Cookers - These cookers are made of a heavy cast aluminum/alloy material and is used is of commercial and restaurant quality. Pressure cooking reduces cooking times and energy costs by two thirds. It makes tough foods tender, and enhances flavor blending for tastier dishes. It also preserves the vivid colors of your vegetables, as well as more of their nutrients. They are appropriate for all types of stoves. This cooker has been designed to satisfy the most demanding requirements. Two operating valve and. an automatic safety valve. Made in Spain with 2 years warranty