Blodgett ovens feature a full welded, extruded angle iron frame that not only keeps ovens square and true, but are the most durable frames on the market. Constructed with 1 inch solid block plus 1 inch mineral fiber insulation for a total of 2 of insulation. Superior turnbuckle assembly keeps door operation hassle-free. Features a double porcelainized interior surface that prevents hidden rust and pitting.