high performance PTFE membrane filter Aijiren-PTFE Membrane They replace the combination of syringe filters, syringes, autosampler vials, septa, and caps with a single unit. Easy as 1-2-3 Description Part No. 0.45 μm PTFE filter vial, 100/pack 5191-5933 0.20 μm PTFE filter vial, 100/pack 5191-5934