Cookever Premium Cookware Stainless Steel Steamer 12.5 Inch Set Cookever Premium Cookware Stainless Steel Steamer 12.5 Inch 18/10 stainless steel. Classic looks, professional performance. Cooking surface does not discolor, react with food, or alter flavors. Solid stainless steel riveted handles(Rivet) stay cool on the stovetop. Safe and comfortable handling. Friction(STS340+AL+STS430), Aluminum encapsulated base heats quickly and spreads heat evenly. Eliminates hot spots.