Millex Syringe Filter, Hydrophilic PTFE, Non-sterile, 0.20 um pore size, 33 mm diameter, 50pk - Emerald Scientific
Millex-GV Filter, 0.22 µm A 4 mm diameter sterile syringe filter with a 0.22 µm pore size hydrophilic PVDF membrane. Comes in a pack of 100. | Sigma-Aldrich
Millex Syringe Filter Unit, Vial Vent 0.22 µm | SLGVS25LS