Nylon Syringe Filter, Membrane Dia 25mm, 0.22um, sterile (100pcs/box) GESFN045-0: Nylon Syringe Filter, Membrane Dia 25mm, 0.45um, sterile (100pcs/box) GESFPES022: PES Syringe Filter, Membrane Dia 25mm, 0.22um, sterile (100pcs/box) GESFPES045: PES Syringe Filter, Membrane Dia 25mm, 0.45um, sterile (100pcs/box) GESFPTFE22: PTFE HYDROPHOBIC