PTFE Membrane Filters. Product #. Description. Add to Cart. BGCM00010. Biopore Membrane Filter roll, Hydrophilic PTFE This Biopore membrane roll is hydrophilic, with a pore size of 0.4 microns. pricing. FGLP04700. Fluoropore Membrane Filter 0.22 µm pore size, hydrophobic PTFE, 47 mm membrane.