superior quality and competitive price,and in various specification according to customer's demand. A. Air cover has key type and drum type, drum type air cover also called air drum.B. Usage: set outside the 3 inches air shaft, can achieve the six inches efficientC. Inner bore Ø 76mm, outside diameter is 150mm, the length is according to the customers’ requestD. Adopt the high quality aluminum alloy hard oxidize, the surface color is tawny,use convenient E. After gassing it is equal to 6 inches air shaft, outside diameter can reach 155-158mmF. The surface of key bar length is 100mm, width is 8mmG. The outside of air drum surface, which part bulge ia made by rubber, having been produced with the design being finalized, we have stock.Total length id 190mm.  

Air Drum