Durapore® Membrane Filter, 0.45 µm 0.45 µm pore size, hydrophobic PVDF, 142 mm membrane; find Millipore-HVHP14250 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich. General description Durapore ® membranes provide high flow rates and throughput, low extractables and broad chemical compatibility.