high flow rate ptfe 0.22 micron filter Kinesis Amazon.com: 0.22 micron filter Millipore GVWP09050 White PVDF Durapore Hydrophilic Membrane Filter, 6.7mL/min x sq cm Water Flow Rate, 90mm Diameter, 0.22 Micron (Pack of 50) 5.0 out of 5 stars 1 Corning 431154 Polystyrene Vacuum Filter/Storage Bottle System, Graduated, Sterile, Cellulose Acetate Membrane, 0.22 Micron, 150mL Capacity (Case of 12)