Title: Black Rubber Conical Stoppers (5mm, 5 Pack)

Description:

These high-quality black rubber conical stoppers (size #5) are ideal for sealing flasks, test tubes, jars, and other laboratory glassware. Each stopper measures 13mm in height, with a larger diameter of 7mm and a smaller diameter of 3mm. The central diameter is 5mm. Manufactured from a chemically and thermally resistant rubber compound (GOST 7852-76, 23-6-3), these stoppers provide a secure and reliable seal. Please note: These stoppers have a rubber odor; consider this when using them for non-laboratory applications. This pack contains 5 stoppers.

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