Rubber Stopper, #3, 1-hole

#7 rubber stopper, 1-hole, fits 500ml Erlenmeyer flasks or 250 ml filtering flasks.

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These #3 rubber stoppers are 18-24 mm diameter. #3 rubber stoppers fit liter soda bottles.

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These #4 rubber stoppers are 20-26 mm diameter with one 5 mm diameter hole.

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These No. 2 rubber stoppers are 16-20 mm diameter with one 5 mm diameter hole.

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Our large-size watch glasses have a slight depression, which makes them useful whenever a shallow vessel is required for a refraction surface.

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With a 50 ml graduated cylinder, you can quickly measure out solutions for chemistry experiments. Made from durable borosilicate glass.

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These #6.5 rubber stoppers are 27-34 mm diameter with one 5 mm diameter hole.

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Everything you need for test tube experiments! This set contains 6 glass test tubes, a rack, cleaning brush, stoppers, and clamp.

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Sodium carbonate (also known as washing soda, sal soda, or soda ash) is an inorganic compound with the formula Na2CO3. Check out the table below to discover the sodium carbonate formula, density, and more!

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This basic glass pipet is also known as an eye dropper or pipette.

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