Flask Closures
Each with its own specific application and fit, a variety of closures are available for use with flasks. Most common flask closures include screw caps and snap caps. Flask closures are typically manufactured from autoclavable plastics such as polyethylene or polypropylene. A wide range of flask closure types are available to accommodate a broad range of laboratory applications and flask varieties, including closures that are sterile or non-sterile, disposable or reusable, and vented or unvented. Vented flask closures commonly include a 0.2 µm filter membrane to prevent contamination of flask contents. For applications that require a tight seal, screw caps with plug seals are available.
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PYREX™ Polypropylene Caps for Erlenmeyer Flasks
As supplied with Pyrex™ Brand Media/Solution bottles. Choose orange caps for temperatures to 140°C (284°F), red caps for temperatures to 180°C (356°F).
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Corning™ PYREX™ Polypropylene Flask Closures
Designed for culture tubes and flasks with long rimless necks
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Corning™ Sterile Disposable Spinner Flask Vent Cap
Designed to fit Corning 500mL, 1L and 3L disposable spinner flasks.
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Corning™ Universal CellSTACK™ Caps
For filling, venting, and manipulation
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PYREX™ Culture Flask Closure
For use with 1135 culture flasks, 1138/10 Fernbach flasks and 1141 baffled flasks.
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Thermo Scientific™ Sterilin™ Silicone Stoppers
Guarantee a tight, reliable seal for your glass and plastic flasks. Suitable for use in various applications.
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Corning™ PYREX™ GL45 Screw Cap with Plug Seal
Nonsterile, reusable caps
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Thermo Scientific™ Nalgene™ Vented HDPE Closures for Sterile Single Use Erlenmeyer Flasks
Ensure a sterile gas exchange for shaker and suspension cell culture by using Thermo Scientific™ Nalgene™ Vented HDPE Closures for Sterile Single Use Erlenmeyer Flasks.
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Heinz Herenz Erlenmeyer Caps
Erlenmeyer cap without handles.
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Corning™ 33mm Caps
Solid or vented