Biomed Scientific Sterile Syringe Filters Hydrophobic PVDF Sterile Syringe Filter PVDF Membrane Diameter 13mm Pore Size 0.22μm[Pack of 10] FEATURES: 1. Hydrophobic, high flow rate and throughput, 2. Low extractables and broad chemical compatibility, 3. Protein binding less than Nylon, NC or PTFE membrane.