A set of six 38 mm diameter acrylic lenses that includes one each: double-convex, plano-convex, concavo-convex, double-concave, plano-concave and convexo-concave.

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Styrofoam ball, 4" diameter, individual, for science experiments.

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This preserved mink specimen is skinned. It's about 14-17" long for the males and 10-14" long for females. It is a double-injected specimen with red latex in the arteries and blue latex in the veins to more easily trace the vascular system.

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This special brush is used to clean our 50 ml burettes.

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Use this 6" tripod stand to support your glassware over a burner. Has a 4" diameter ring with 6.25" legs.

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These top-opening glassine evelopes are preferred by insect collectors.

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You've heard it before: don't stare at the sun. View the sun safely with these UV-blocking direct sun viewing glasses!

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

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These No. 14 lab-grade corks fit Pyrex 250 ml flasks and most 500 ml flasks.

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Diluted hydrogen peroxide, 6% solution, in a 30 ml bottle. Find the hydrogen peroxide formula, density, and more below. Plus, learn about how hydrogen peroxide is used in the Elephant Toothpaste Experiment!

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Use this pearly solution to demonstrate ocean currents, turbulence, convection, and other fluid movements.

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#7 rubber stopper with two 5mm holes.

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This 30 g bottle of aluminum sulfate, also spelled aluminium sulphate, comes in hydrated form.

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This distillation adapter provides two connections to a round bottom flask.

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Metal clamp attaches to a meterstick to make a simple balance.

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This activated charcoal powder is made up of pure carbon. It is used in many industries for purification processes. This chemical is flammable; please read warning labels carefully. Find its density, formula & more below!

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This porcelain evaporating dish is 110 mm diameter, 44 mm high and has 200 ml volume capacity.

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Minks are less expensive than other large mammal carnivore specimens, like the cat.

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Use this 500 ml distilling flask to perform simple distillations cost effectively.

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10 x 12.5 cm white card with a millimeter scale on one edge.

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A large pack of narrow wooden splints that can be used for various experiments.

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

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This 30 ml (1 oz) Barnes dropper bottle is very popular for indicator solutions and stains.

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Diameter of 12-13 mm. Fits small test tubes.

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This variable resistor is used to regulate the voltage in an electric circuit.

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This coupon is redeemable for a culture of 30 live mealworms. There are no additional charges to redeem the coupon.

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This 250 ml (8 oz) amber glass Boston round bottle is ideal for storing chemical solutions, most solvents, acids and bases.

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30 g bottle of calcium acetate. Sized for home chemistry! Find the calcium acetate formula, weight, density, shelf life, and more.

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This 25 ml PYREX brand narrow mouth Erlenmeyer flask meets ASTM E1404 specifications and are made from low expansion, Type 1, Class A borosilicate glass that is capable of withstanding typical laboratory temperature variations.

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Crystalline powder form of potassium hydrogen phthalate, also known as potassium acid phthalate, potassium biphthalate, or simply KHP. Look below to discover the potassium hydrogen phthalate formula, density & more!

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These replacement carbon discs are designed for use with the AC Spark Recording Timer. 10 per pack.

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Clear semi-circular polystyrene container that can be filled with water for refraction studies.

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These #0 rubber stoppers are 13-17 mm diameter with two 3 mm diameter holes.

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Food grade vegetable rennet for cheese making.

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Investigate fluorescence with this set of six minerals that glow under ultraviolet light.

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Use this friction block with attached hook for force and motion studies.

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