Dimension of 3" Aluminium air shafts are between 170 mm — 5000 mm. Standard body sizes is 6" According to customers' special requirements we can produce between 25 mm (1") — 300 mm (12"). On our products have special cover about 50 HRC hardness Aluminiums are produced by the extrusion technique and anodizing is covered over. And standard producs are with 12 canals. We can produce heading according to customer drawing and cover it with chorme. With this way it is redouble endurance limit for corrosion in external environments. After finished product we are doing leaks and balancing tests.