This type of filter is used inside vacuum pumps, blowers and compressors. The housing-filter is completely in iron, painted with black epoxy resin that guarantees an op+mal proof and adaptability in all external environments. In the inner there is the interchangeable cartridge (paper, polyester, inox steel, ac+ve carbon), and the rubber gaskets NBR 70 Shore. This product is equipped with two female or male threaded gas connec+ons, or female NPT threaded.