LLG Labware 

LLG-Stoppers, silicone, with turn-over flange

These stoppers guarantee perfect sealing even with poorly finished rims on glass or plastic bottles. The top of the stopper has a septum which can be punctured by a hypodermic needle. Very secure fit prevents accidental opening of the flask.
Material:Silicone
X

Item added to basket.

LLG-Stoppers, silicone, with turn-over flange

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Alternate products:
 LLG-Stoppers, rubber, with turn-over flange / LLG Labware