... 2um. Membrane material has:CN-CA, Nylon, PVDF, PTFE. Choose proper membrane is very important. Name Filter Diameter ApertureMembrane ... bear pressure reach to 7bar4. Edge of the syringe filter has thread, have function of anti-skidding, which is welcomed by ... membrane company, which guarantee stable quality, high precision of the membrane aperture, supply utmost protection for your instrument and ...