Hydrophobic Membrane Filter Hydrophobic Membrane Filter 0.2 Micron Hydrophobic Ptfe Disc Membrane Filter. US $14.57-$96.00/ Pack. 1.0 Packs (Min. Order) CN Hawach Scientific Co., Ltd. 6 YRS. 94.9%. 4.9 ( 15) "Wonderful customer service" "Great company". Contact Supplier.