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Single #00 Rubber Stopper – 10–15 mm for Small Test Tubes & Flasks
The #00 Rubber Stopper is designed to securely fit small test tubes and laboratory flasks with openings measuring approximately 10–15 mm in diameter. Ideal for homeschool chemistry labs and classroom science experiments, this stopper helps create a tight seal during heating, gas collection, or solution storage.
Constructed from durable rubber, it provides reliable resistance to common laboratory use while maintaining flexibility for easy insertion and removal. Its tapered design ensures a snug fit in appropriately sized glassware.
Product Details:
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Size: #00
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Fits openings approximately 10–15 mm in diameter
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Suitable for small test tubes and flasks
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Durable, solid rubber construction
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Ideal for chemistry and general lab applications
An essential laboratory accessory for structured science curriculum in homeschool programs, co-ops, and classroom environments requiring secure glassware sealing solutions.
Actual item is a single rubber stopper - not all four shown in the image.