More detail can be found in following link on Katom and JES Restaurant. The Interior size is 15" and 24" Upper and Lower.Please let me know if you are interesting for commercial Oven. The item "Southbend Electric Commercial Oven" is in sale since Monday, December 18, 2017. This item is in the category "Business & Industrial\Restaurant & Catering\Commercial Kitchen Equipment\Cooking & Warming Equipment\Ovens & Ranges\Convection Ovens". The seller is "huanx555" and is located in Charlotte, North Carolina. This item can be shipped to United States.