The Glo-Ray® Built-In Heated Shelf with Flush Top is a versatile and efficient addition to your serving surface. With a surface area of 73-1/2" x 17", this foodwarmer features a hardcoat aluminum top and a blanket-type element for uniform heat distribution. The built-in adjustable thermostat allows you to control the surface temperature, while the fiberglass insulation keeps the heat at the holding surface. This heated shelf also comes with a control thermostat, an illuminated on/off switch, and a mounting bracket for easy installation. It is NSF, cUL, UL, UL EPH Classified, ANSI/NSF 4, and CSA certified for added safety and reliability. The .75" flanged edge of the shelf allows it to fit into a countertop opening, making it suitable for use in metallic counters. For other surfaces, please ensure that the material can withstand temperatures up to 200°F (93°C). The GRSBF models are available in various widths and depths to suit your specific needs. Please note that models with a flush mount recessed electronic control box are not CE approved, and non-standard colors are non-returnable. Hatco is not responsible for any counter damage caused by the heat from the warmer. Optional features include designer colors for the flush mount control bezel box, conduit in lieu of the standard 3' length, stainless steel top surface, and flush mount electronic or thermostatic control boxes with lighted power switches and cords.