These fin dies are suitable for refrigeration, freezing, or some special industries. 9.52 fin dies have a flap height up to 8mm, 12.7 fin dies have a flap height up to 11mm and 15.88 fin molds have a flap height up to 12mm. The flap height of fin dies depends on many factors, such as aluminum foil, volatile oil, fin hole distance and column distance, etc.