Devices Millex® syringe filters, filter discs Glass Fiber Filters Membrane Material Borosilicate Glass or Quartz Microfibers Pore Sizes (µm) 0.2 – 8.0 Thickness (µm) 230 - Water Flow Rate (mL/min/cm2) 1.2 - 6.0 Air Flow (L/min/cm2) @ 10 psi 10.6 - 139