Durapore® Membrane Filter, 0.22 µm 0.22 µm pore size, hydrophilic PVDF, 25 mm membrane; find Millipore-GVWP02500 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich Durapore ® membranes provide high flow rates and throughput, low extractables and broad chemical compatibility.