... H fin tube, H fin economizer, H fin tube economizer, H type finned tube, square fin tube.It is ... . H-economizer can also manufacture dual tube "double H" type fin tubes, its rigid structure, and ... can be applied to a longer tube row occasions ... steel, stainless steel, Aluminium and alloy steel; Bare tube size:OD20mm-OD273mm; Fins Pitch: 3mm-30mm; Fins ...