Aluminum composite finned tube base tube material: carbon steel, stainess steel, copper, fin type: Extruded type, L type, DL type, KL type, Embedded (G) type,etc. OD25mm~80mm, fin pitch 2.0mm~4.2mm, fin thickness 0.3mm~0.5mm, Single metal finned tube, low fin tube, U type tube,etc. material aluminum , carbon steel, copper,  aluminum srtip material 1100,1060.