One-piece thermoset wells concentrate heat in water bath, will not pit or rust. Each well is equipped with a drain valve - no need for spillage pans. Thermostatic controls automatically adjust for water temperature and food volume changes. Stainless steel construction resists stains and corrosion. Includes 7-1/2"D plate shelf and 8"D x 3/8" thick polyethylene cutting board. Accepts pans up to 6"D. 120V, but not standard 120V plug, includes 10' cord. 5-50R Plug. FYI: Shipped knocked down. UL, NSF. Ships from WI.