Title: Black Rubber Conical Stoppers (10mm, 5 Pack)

Description:

High-quality, black rubber conical stoppers, ideal for sealing flasks, test tubes, jars, and other laboratory glassware. These stoppers (size #7.5) measure 20mm in height, with a larger diameter of 12.1mm, a smaller diameter of 8.1mm, and a middle diameter of 10mm. Manufactured from a heat and chemically resistant rubber compound (GOST 7852-76, 23-6-3), these stoppers are durable and reliable. Please note: these stoppers have a rubber odor; consider this when using them in non-laboratory applications. Sold in a pack of 5.

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