Rubber Stopper, #8, 1-hole

These #10 rubber stoppers are 42-50 mm diameter with one 5 mm diameter hole.

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These #8 rubber stoppers are 33-41 mm diameter with two 5 mm diameter holes.

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#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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42-50 mm diameter. Fits many vacuum bottles.

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These #9 rubber stoppers are 37-45 mm diameter with one 5 mm diameter hole.

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These #9 rubber stoppers are 37-45 mm diameter with two 5 mm diameter holes.

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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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Get a backlit digital lab scale with high precision, ease-of-use, and durability! This compact digital platform scale has a large 300 g capacity, provides very accurate 0.01 g sensitivity, and is incredibly easy to use.

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These #3 rubber stoppers are 18-24 mm diameter with one 4 mm diameter hole.

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