Syringe Filter, PTFE, Pore Size:0.22μm Diameter:4mm; Wettability:Hydrophobic, Filtration Area 0.125cm2, Housing Material: Polyproylene; Holdup-Volume 1ul, PTFE Syringe Filters – Pall Shop. Learn more about the Pall non-sterile syringe filters with PTFE membrane. in HPLC and UHPLC sample preparation, Pall Acrodisc syringe filters with PTFE