Flask Closures

Flask Closures

An assortment of flask closures to accommodate a broad range specific of laboratory applications. Typically manufactured from autoclavable plastics such as polyethylene or polypropylene, flask closures are available as sterile or non-sterile, disposable or reusable, vented or unvented, and may be snap-cap or screw-cap in format. Vented flask closures commonly include a 0.2 µm filter membrane to prevent contamination of flask contents. Screw caps with plug seals are available for applications that require a tight seal, such as Thermo Scientific™ Sterilin™ Silicone Stoppers.

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Guarantee a tight, reliable seal for your glass and plastic flasks. Suitable for use in various applications. Thermo Scientific™ Sterilin™ Silicone Stoppers are suitable for use over a wide temperature range: -50° to +200°C.
Allow constant airflow and minimize chance of contamination with Thermo Scientific™ Nunc™ Sterile Flask Replacement Filter Caps.
For use with 1135 culture flasks, 1138/10 Fernbach flasks and 1141 baffled flasks.
Cut down on evaporation.
Designed for culture tubes and flasks with long rimless necks
For filling, venting, and manipulation
Designed for use with Falcon 25-, 75-, and 175cm2 flasks