Member's Mark 13 pc. Stainless Steel Cookware Set Impact-bonded, tri-ply base construction. Premium 18/10 stainless steel Ergonomically designed cast stainless steel handles. Heavy-duty, non-corrosive rivets with stainless steel caps 18/10 Stainless Steel Lids. Induction Ready Belly Shaped. Versatile cookware shapes and sizes to satisfy every cooking need NSF Certified. Compatible with the following types of cooktops: induction, electric, gas, ceramic glass