... of paper products, filtter paper, air filter paper, oil filter paper and fuel filter paper.. Product Description Our company has ... and elementary-effective, sub-high-effective, high-effective air filter, bag filter etc. Please recognize the trademark "Donglv" and "Kelin", ... Thanks a lot Mr. Hagon Moblie:15032163427 Shijiazhuang Kelin Filter Paper Co, LtdWestside of Nanbaitanqiao, Cangshi Road, Jinzhou, ...