These disposable high density polyethylene sterile vent caps contain a 0.2 µm pore hydrophobic PTFE membrane. They are designed to fit the Corning® 500 mL, 1L and 3L Disposable Spinner Flasks (Cat. Nos. 3153, 3561and 3563) for culture applications requiring increased gas exchange. They also fit Corning disposable polystyrene and polycarbonate storage bottles and glass bottles with GL45 threads for applications requiring venting. These disposable high density polyethylene sterile vent caps contain a 0.2 µm pore hydrophobic PTFE membrane. They are designed to fit the Corning® 500 mL, 1L and 3L Disposable Spinner Flasks (Cat. Nos. 3153, 3561and 3563) for culture applications requiring increased gas exchange. They also fit Corning disposable polystyrene and polycarbonate storage bottles and glass bottles with GL45 threads for applications requiring venting.