Ventilation tube set up in the ear at the level of the tympanic membrane to improve aeration of the middle ear to treat acute otitis. - ENTtoday
1pcs Lab 50mm 0.2um PTFE Ventilation Membrane Filter for Fermenter or CO2 Incubator - AliExpress
Ventilation screw caps DURAN® with ePTFE membrane, GL 25, blue | Seals, hose connectors and accessories | Containers, bottles, tins and canisters | Laboratory Glass, Vessels, Consumables | Labware | Carl Roth - Austria
OEM AYNUO Purple EPTFE Composite Breathable and Waterproof Vent Membrane for Automotive and Electronics Manufacturer and Supplier | AYNUO