... to ensure optimal quality product Materials of ConstructionMembraneDouble Layer Hydrophilic PESSupport MaterialpolypropyleneCore, Cage and End CapspolyesterO-RingsSilicone ... technologyThermal BondingDiameter2.7 inches (6.8cm)Length5 inch ,10 inch, 20 inch, 30 inch,40 inchTypical ... Bacterial Retentionfor more information, please contact usExtractables, per 10-inch cartridge≤ 50 mg after 24-h soak ...