ePTFE Membrane Water Filtration Membrane for Water Filter Expanded PTFE Hydrophilic Membrane. $1.00-$10.00/ Square Meter. 500 Square Meters (Min. Order) CN Dongyang Jinlong Filter Co., Ltd. 5 YRS. Contact Supplier. Therefore it is featured by corrosion resistance, chemical resistance, high durability, high strength, anti-penetration, oil