Wells HSW-6D Built-In Rectangular Food Warmers are designed for top mount installation and to hold heated foods at safe and fresh serving temperatures. Accommodates one 6″ X 20″ half-size food pan or equivalent fractional inset pans and one-piece stainless-steel top flange and deep-drawn stainless-steel warming pans. Individual controls for each well, powerful tubular heating elements are located under the warming pans, thermostatic controls, and WellsLok standard. 120V with Drain