Millex-FH Filter Syringe Filter Unit, 0.45 µm, hydrophobic PTFE, 50 mm, HB/HB A 50 mm diameter non-sterile syringe filter with a 0.45 µm pore size Ptfe syringe filters 0.45 13 mm – Sigma-Aldrich Results 1 – 25 of 25 This 33 mm syringe filter with a Hydrophilic PTFE membrane, for non-sterile filtration on the Samplicity G2 system, has a 0.