Cellulose acetate membrane, hydrophilic, low protein binding, suitable for the filtration of proteins and aqueous solutions in biological samples, such as serum culture medium filtration. Product Show. Syringe Filter Membrane : Nylon/PTFE/PES/MCE/ PVDF/ CA. Syringe Filter Diameter (mm) :13mm & 25mm. Sterile Syringe Filter with Various Membrane.