The FS-4 is a warmer/cooker that is constructed of stainless steel with a stainless steel water vessel as well. An adjustable thermostat, with degree markings, exlusive hinged lid and water bath design keep your product at the perfect serving temperature. Standard features include: Stainless steel construction Adjustable, precalibrated thermostat for accurate heat control Exclusive 4-qt (3.8 L) inset and lid Hinged lid stays upright during ladling for easy customer use Lid rim returns moisture to the food to retain flavor Water fill line eliminates overflow accidents.