Thermoset Fiber-Reinforced Resin Well – self-insulating and maximum energy efficiency, Capillary tube thermostat control supplies power only when needed for maximum power efficiency, Dome heating element uses up to 25 percent less energy and concentrates energy into the well, Elements non-stick surface prevents scale build-up for easy cleaning and longer operating life, Element is cast in for longer service life and greater energy transfer, Standard black well and brushed exterior, Wide no-drip lip keeps countertop dry no. Recommend using up to 4 10.2 cm deep food pans - standard and fractional sizes, Overall dimensions: 213/4L. x 133/4W. x 9H, 6 cord and plug, Bottom exit power cord