Rubber stopper, DURAN®

This bromobutyl rubber closure provides a gas-tight seal for all GL 25 and GL 45 laboratory bottles with sizes from 10 to 20000 ml.

Elastic material for reliable self-sealing after needle piercing
Upper surface features seven numbered hemispherical impressions for needle piercing
Resistant to temperature from –50 to +121 °C

Suitable for storing oxygen-sensitive materials, cultivation of anaerobic microorganisms (pressure resistent bottles recommended), aerobic methane oxidation (MOx) studies, storage of anaerobic culture media (amber glass bottles recommended), applications requiring gas purging or sample transfer through syringes.

: Conforms to EP 3.2.9 Type I closure for chemical and penetration tests.

: Standard DURAN® original GL 45 lab bottles are not pressure resistant. If build up in pressure is anticipated, it is recommended to use the stopper without the GL 45 red open top cap. The use of pressure resistant bottles such as DURAN® pressure plus+ should be considered.
Needles larger than 20 gauge are not recommended.