The Glo-Ray® Drop In Heated Shelf with Recessed Top is a versatile and efficient addition to your serving surface. With a recessed top that is 25-1/2" x 17" and 1/2" deep, this heated shelf features a hardcoat aluminum surface for uniform heat distribution. It also has a control thermostat and an illuminated on/off switch for easy operation. The shelf comes with a mounting bracket for easy installation and is NSF, cUL, UL, UL EPH Classified, ANSI/NSF 4, and CSA certified. The heated shelf is equipped with a thermostatically-controlled heated base and a blanket-type element for extended food holding time. It also has fiberglass insulation to keep heat at the holding surface. The built-in adjustable thermostat allows you to control the surface temperature. The shelf comes with a 36" flexible conduit that channels power lines from the shelf to a control box. The standard controller includes an infinite switch, a lighted rocker switch, and mounting brackets. The shelf has a .75" flanged edge that allows it to fit into a countertop opening. It is recommended for use in metallic counters, but can also be used on other surfaces as long as they can withstand temperatures up to 200°F. The GRSB models are available in various widths and depths, and come with a blanket-type element. Please note that models with a flush mount recessed electronic control box are not CE approved. Non-standard colors are non-returnable, and Hatco is not responsible for counter damage caused by heat from the warmer. Optional features include designer colors for the flush mount control bezel box, such as black, navy blue, warm red, gray granite, white granite, hunter green, and antique copper. Conduit options are also available, including a 6' or 10' conduit in lieu of the standard 3'. You can also choose between a flush mount electronic control box with a lighted power switch and cord and plug, or a flush mount thermostatic control box with a lighted power switch and cord and plug.