... 99.99%Construction: Cartridge FilterMedium Material: FiberglassFunction: Air FilterSurface treatment: Smooth treatment, waterproof...Application: Cement, ... in all kinds of air compressed station, esspecially for centrifugal ,screw, vane air compressor.1: Cenment2: ... for cover and frame is galvanized plate , with perfect anti-corrosion and anti-rusty performance. recycle liquid gas filter element for air ...