Features: 1.Hydrophilic PTFE Cartridge Filters uses hydrophilic polytetrafluoroethylene (PTFE) microporous membrane; 2.With the characteristics of wide chemical compatibility, low protein adsorption and high flow capacity ; 3.Suitable for bio-pharmaceutical field, e.g. medicine water, eyedrops and diagnostic reagents,etc; 4.Using double layer PTFE microporous membrane; 5. 0.22 microns efficient aseptic filtration precision; 6.Using polypropylene (PP) skeleton and the supporting material; 7.Comply with FDA and GMP requirements; 8.Its material meets the current USP Biological Safety standards and GB9688-1988, GB/T17291-1998 standards; 9.100? passed the integrity test before shipment ; 10. Provides complete verification guidance document and verification services; 11. Passed rigorous verification before shipment: 12. Bacteria challenge test; 13. Integrity test; 14. Biological safety test; 15. Flow measurement; 16. Pressure test; 17. Heat resistance test; 18. Cleaning test; 19. Chemical compatibility test.