Kirkland Signature Stainless Steel TriPly Clad Cookware Set 13 Piece Professional Quality: Tri-ply construction alternates layers of stainless steel and aluminum to regulate heat distribution, eliminate hot spots, and provide precise temperature control. 18/10 Stainless Steel Interior: Hygienic, stain resistant and will not react with food; Aluminum Core: Fast, even heating all the way up the sides of the pan with no hot spots 18/0 Stainless Steel Exterior: Suitable for all cooktops including induction; 18/10 Stainless Steel Lids: Heavy-gauge lids fit precisely for heat and nutrient retention. The snug fit promotes self-basting. 18/10 Stainless Steel Handles: Strong, double-rivet ergonomic cast stainless steel handles stay cool on the cooktop.;Induction Capable: All stove top capable and induction ready 8 Qt. Covered : 4.5 Qt. Covered Saute Pan : 4 Qt. Covered Chef's Casserole : 3 Qt. Covered Saucepan with Saucepan Steamer : 1.5 Qt. Covered Saucepan : 10" Skillet : 8.5" Skillet