Magefesa Practika Luxe Stainless Steel 4 and 6 Quart Super Fast Pressure Cooker (6 Piece) 3 cooking levels: traditional slow cooking: max 6 psi, fast cooking: max 9 psi, super fast cooking: max 15 psi. Made of 18/10 surgical stainless steel. 4 additional safety systems: working valve, over pressure valve, safety edge lid window and "easy lock" system (prevents opening before pressure is released). Made of 18/10 surgical stainless steel Encapsulated base: 18/10 stainless steel + aluminum + 18/10 stainless steel for even heat distribution. Designed and made in Spain