See detail @ http://www.amazon.com/gp/product/B00005AL5Q?&tag=cybermday-20 The bestseller among All-Clad's renowned cookware collections, the Stainless line provides serious and professional cooks with all the virtues that make All-Clad's worldwide reputation unsurpassed. Key to its high performance is a three-ply, bonded construction. Sandwiched between the exterior and an 18/10 stainless-steel interior is a thick aluminum core that spreads heat evenly across the bottom of the pan and all the way up its sides. The interior is 18/10 stainless steel, highly polished so it's stick- as well as stain- and corrosion-resistant. The exterior is gleaming, magnetic stainless steel that works on induction as well as conventional stovetops and, with care, remains beautiful during this cookware's lifetime warranty against defects--and beyond.