All-Clad 62025SS Copper Core 5-Ply Bonded Dishwasher Safe Porcelain Double Boiler Insert / Cookware, Silver Double boiler with 2-Quart Copper Core sauce pan and 1.5-Quart porcelain insert; gently transfers heat for expertly melting chocolate, making custards, or cooking delicate sauces 5-ply bonded construction with stainless steel, aluminum, and a thick copper core for even heating, warp-free strength, and reliable responsiveness Highly polished 18/10 stainless steel interior with starburst finish offers superior stick resistance and easy maintenance, plus wont react with food Riveted stainless-steel handles with venting and contoured for a comfortable grip; stainless-steel lids; flared edges; capacity etched on base Oven safe and broiler safe up to 600 degrees F; optimized for induction; dishwasher-safe; limited lifetime warranty; made in USA