Simsii Syringe Filter, Hydrophobic PTFE Membrane Disc, Diameter 25 mm, Micron Pore Size 0.45 um, Pack of 100 Syringe Filter, Sterile Syringe Filter, Sterile Individually Packed, PES Membrane 0.22um Pore Size, 33mm Membrane Diameter, Sterile 4.2 5 ...