Wells SS-206TU Built-In Rectangular Food Warmers are designed for top-mount installation and to hold heated foods at safe and fresh serving temperatures. Accommodates one 12″ X 20″ standard food pans or equivalent fractional inset pans. One-piece stainless steel top flange and heavy gauge, deep-drawn stainless steel warming pans are standard as well as Wellsloks for quick and easy installation. Separate controls for each individual wells, powerful tubular heating elements are located under the warming pans, and high limits prevent overheating. Themostatic Control, UL Approved, 120V