May 08, 2021 · Membrane Filter, 0.22 µm | Sigma-Aldrich Millex-GV Filter for Samplicity G2, 0.22 µm, PVDF, 33 mm, non-sterile. This 33 mm syringe filter with a Hydrophilic PVDF membrane, for non-sterile filtration on the Samplicity G2 system, has a 0.22 µm pore size used in preparation of protein-containing solutions China 0.22um 0.45 Micron Hydrophilic Nylon/Pes/PVDF/PTFE Filter Membrane 0.22um 0.45