PVC, ethylene oxide sterilized, 25 mm diameter sterile syringe filter with a 0.2 µm pore size hydrophobic PTFE membrane. Comes in a pack of 50. Millex ® syringe filter units with hydrophobic Fluoropore ™ membrane are ideal for in-line sterilization of gases and venting sterile containers, and filters with Fluoropore ™ membrane can also be used for sterilizing or clarifying organic solutions.