Wells HT-400 Bain Marie Style electric top-mount, drop-in food warmers are designed to hold heated foods at safe and fresh serving temperatures. This single-opening, heated tank provides consistent temperature and can accommodate a variety of round or rectangular inset pans. Drain and WellsLok are standard. Designed for wet operation only, is fully insulated, and thermostat controls. Four 12″ x 20″ Pans, Standard Opening 25 3/4″ x 19 7/8″, 208/240V