Syringe filter, Polytetrafluoroethylene (PTFE) Ø25mm, 0.20um 50/pk 71,000 12SF-3331 Syringe filter, Polytetrafluoroethylene (PTFE) Ø25mm, 0.45um 50/pk 71,000 12SF-3321H Syringe filter, Polytetrafluoroethylene Hydrophilic (PTFE HP) Ø25mm, 0.22um 50/pk