Industry Treatment Use PP PTFE PVDF Pes Nylon 5 10 20 Inch Pleated Membrane Water Filter with DOE Soe End Cap Microporous pleated filter element, the main filter material is : Stainless steel wire mesh, sintered wire mesh,Polypropylene, Hydrophobic PTFE, Hydrophilic PTFE,Polyether sulfone, Nylon, etc.