Kuhn Rikon 3150 Duromatic Trio 12-Piece Pressure Cooker Set Set includes 2-1/2-quart saucepan/pressure cooker; 4-, and 6-quart pressure cookers; 1 stainless-steel pressure lid shared by the 2 larger cookers; 2 glass lids; 2 steam trivets; 2 basket inserts; cookbook Durable 18/10 stainless steel with solid aluminum core in base for quick, even heating New generation system is quiet and safe; saves time, money, and energy Spring-loaded precision valve; integrated lid locking; 5 safety releases Made in Switzerland; hand washing recommended; 10-year warranty