... 2. used in labs 3. with full series for customer choice CN-CA Syringe Filter One ... is very important. Name Filter Diameter ApertureMembrane materialHydrophilic Series ¢13 mm ¢25mm0.22, 0.45, 0.8, ... 1.2(um)CN-CAHydrophobic Series ¢13 mm ¢25mm0.22, 0.45, 0.8, ... 1.2(um)Nylon Hydrophobic Series ¢13 mm ¢25mm 0.22, 0.45, 0.8 ... , 1.2(um)PVDF Hydrophobic Series ¢13 mm ¢25mm 0.22, 0.45, 0.8 ...