Engel-Riviere All-Ply Copper Core Signature Dolphin Wok 18/10 stainless-steel interior for hygienic use and easy cleanup All-Ply copper core allows for the quickest heat-up time, maximum temperature control and rapid, even heat distribution Stay-cool hollow handles for balance, control and minimized heat transfer Oven Safe to 600 Degree Fahrenheit and NSF, UL and CE approved Ideal for use on any cooktop (Electric, Gas, Ceramic, Induction & Hi-Light) & Lifetime Warranty