using in auto oil filter dear sir this is Mr. hagon from Shijiazhuang Kelin ... Leading Manufacturers of paper products, filtter paper, air filter paper, oil filter paper and fuel filter paper..Product Description Our company ... Paper Co, LtdWestside of Nanbaitanqiao, Cangshi Road, Jinzhou, Hebei, P. R. ChinaTel: 86 311 84359889Fax: 86 311 84369566