Kinesis 0.22 um PTFE filter with high quality palstic 0.2um ptfe syringe filter on stock-PTFE Membrane Filter Syringe Filter, PTFE, 25mm diameter, 0.2um, 100/pk (Scientific Strategies # FPT250020-100PK) Polytetrafluorethylene is used for the filtration of aggressive chemicals, including acids and non-aqueous solvents, as well as for GC and HPLC