SVT venting filters are reusable units that contain a reinforced PTFE membrane with polypropylene support grid, in a polypropylene housing. These units are easily connected to fermenters, containers or biological reactors. They can work at high pressure. The large filtering surface (20 cm2) makes it possible to work at high airflow rates even with a low-pressure differential. They are supplied in two pore sizes, 0.2 and 0.45 μm.