Kuhn Rikon Stainless-Steel Pressure Cooker, 2.5 qt Highest quality 18/10 stainless steel keeps its lustrous shine and will not rust, corrode, or chip. Solid thermal aluminum sandwich base conducts heat superbly for even cooking of all foods whether you use gas, electric, ceramic or magnetic induction Spring-loaded stationary quiet safety valve has a visual indicator pin telling you how much pressure is inside the cooker Automatic lid-locking system prevents the lid from opening while the cooker is under pressure No fewer that five safety features engineered into each cooker make Duromatic the worldwide standard of safety