... PP filter cartridge 1) Filter material: Polypropylene 2) High procision 3) Long serveice life 4)double open end Melt blown PP filter ... Workable PH: 1-136) Product specification length: 10/20/30/40 inches/7) Structural classification: ... such as air filter, water filter, oil filter, carbon filter, acid filter, oil purifier, filter bag, bag filter, filter cartridge , filter equipments etc.Reason 4Shanghai ...