Features of Sterile Hydrophobic PTFE Syringe Filters. •Provide regular size sterile syringe filter: 0.22 μm and 0.45 μm PTFE syringe filter. •Require pre-treatment with alcohol before being suitable for aqueous or high aqueous/organic samples. •Unlike sterile GF syringe filters, sterile hydrophobic PTFE syringe filters are resistant to