Rubber Stopper, #5, 1-hole

These #5 rubber stoppers are 23-27 mm diameter.

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These #00 rubber stoppers are 10-15 mm diameter with one 3mm diameter hole.

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These #0 rubber stoppers are 13-17 mm diameter. #0 rubber stoppers fit large test tubes.

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These #00 rubber stoppers are 10-15 mm diameter.

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

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Discover magnetism with this strong grade-1 ring magnet. Handy for a variety of science projects, the magnet is unpainted for rugged durability.

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Want a real chemistry set for your kids? Look no further! This beginners chemistry set comes with all the basic lab equipment needed for chemistry experiments & projects. Get high-quality beakers, test tubes & much more!

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You will always have the right size rubber stopper on hand with this 2 lb package of assorted solid, 1-hole and 2-hole stoppers ranging in size from #00 to #8. You get 60 stoppers total.

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This metal burette clamp attaches to a ring stand to hold a single glass burette, test tube, flask, etc. for chemistry labs.

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This Lugol's iodine solution stains carbohydrates in plant & animal specimens brown or blue-black & stains glycogen red. An aqueous solution of 1.8% iodine & 3.0% potassium iodide. Lab grade; not for food or medical purposes.

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