This is a 18 mm Hydrophobic PTFE Membrane Filter with a 0.45 micron pore size. For use in Sterilizing filtration, bioassays, solvent filtration. Pricing Match Criteria: Product Name Millicup-FH, 0.45 µm, hydrophobic, PTFE, non-sterile Millicup-FH, 0.45 µm SDS