Certified Syringe Filter Membrane Exporter 0.2 syringe filters | Sigma-Aldrich SAMP2GNNB This 33 mm syringe filter with a Hydrophilic Nylon membrane, for non-sterile filtration on the Samplicity G2 system, has a 0.2 µm pore size used in preparation of aqueous & organic solutions prior to chromatography or other instrument analyses.