Microchannel folded tube is produced by precise roll forming of an aluminum tube stock material. One kind is two-piece folded tube, which outside tube and inner fin are formed separately and then assembled to be a whole tube. Another is one-piece folded tube formed by one single aluminumstrip. Folded tube can be used as refrigerant tube in brazed aluminum heat exchangers such as condensers and evaporators for automotive, as well as air conditioning and refrigeration applications. Combining Folded Tube technology with Gränges’ portfolio of tube stock materials enable high reliability, light weight, cost reduction and improved performance.