... 25mm,47mm, 60mm,90mm,120mm,293mm ... About hydrophilic lab membrane filter discs:Specification:Material:Removal Rating :0.20µm, 0.45 ... Roll Membrane: 270mm, 300mm Typical Data MaterialN66,PES,CN-CAThickness110±10µmFilter SurfacePlainWettabilityHydrophobicAbsorption0.2µm membrane absorption capability: 100g/cm2 bovine ... usually apply CN-CA membrane,which is more suitable. membrane filter discs