We are specialized in manufacturing dust release filter cartridge and filter media.We are located at GUANGZHOU city in China.We want knoow what kind of air filter you want .We can supply different filter cartridges which are used in different environment.We hired domestic experts and professors to guide us on special treating technic on polyester spunbonded nonwovens, the product has been widely used in different fields, and technically fill up a gap in China’s filter cartridges making.We used PTFE membrane technology.So our filter media has high efficence which is 99.9% on 0.5 μm.