... tube can be replaced for almost air heat exchanger/Air Radiator tube ,Website:http://www.jmhex.com, you only have to know the tube ... dimension .Air radiator can ... ,Finned plate distance : 5mm, 6mm,8mmAlso can be customizationMaterial:Tube :Carbon steel , stainless steel, steel , CopperFin :Aluminum , Stainless ...