Rubber Stopper, #3, solid

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

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

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These solid No. 2 rubber stoppers are 16-20 mm diameter.

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These #8 rubber stoppers are 33-41 mm diameter with one 5 mm diameter hole.

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These #1 rubber stoppers are 14-19 mm diameter.

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Night-lights can be found in many homes, even yours! Build your own night-light or lantern with this fun engineering project. The circuit you build using this kit is just like what you'd find in a night-light at the store.

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These solid #5.5 rubber stoppers are 24-28 mm in diameter.

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Laboratory grade acetone. It's a laboratory must-have!

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

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This affordable 600 ml beaker is made of borosilicate glass & makes an excellent addition to any science lab. Along with test tubes & other lab glassware, use this high-quality piece of lab equipment for all your experiments!

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