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