The Duke ACTW-1 is constructed of 300 series stainless steel. Top rim and food well liner are one piece heavy gauge stainless steel with deep drawn coved corner construction. The food well is 6 1/2" deeo with a top opening measuring 12" x 20" to accommodate full, 1/2 and 1/3 size food pans. The unit can only accept pans up to 6" deep. The warmer is heated by a 1200w element controlled by an infinite switch with an indicator light.