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These #9 rubber stoppers are 37-45 mm diameter with two 5 mm diameter holes.
Ages 8+
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These #10 rubber stoppers are 42-50 mm diameter with no holes. #10 rubber stoppers fit 2000 ml Erlenmeyer flasks and many thermos vacuum bottles.
Ages 8+
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This bimetallic compound bar is made of two dissimilar metals and used to demonstrate how different metals expand thermally at different rates.
Ages 11+
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These No. 2 lab-grade corks fit our small 13 mm x 100 mm test tubes.
Ages 5+
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Replenish your rock tumbler for more rock tumbling fun!
Ages 10+
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30 g bottle of potassium bitartrate, also known as potassium hydrogen tartrate or cream of tartar. Take a look at the table below to discover the potassium bitartrate formula, how it can be used to grow crystals, and more!
Ages 12+
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Supports crucibles, evaporating dishes or funnels on a ring support when heating to high temperatures.
Ages 11+
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The large 3" diameter of this magnifier makes for convenient viewing.
Ages 6+
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These #5 rubber stoppers are 23-27 mm diameter with two 5 mm diameter holes. No. 5 rubber stoppers fit Pyrex 125 ml Erlenmeyer flasks.
Ages 8+
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This linear diffraction grating contains 500 lines per mm and is mounted in a 2"x2" cardboard frame.
Ages 11+
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Spring scales measure weight or force by hanging an object from its hook. To measure loose material such as sand, pour into a plastic bag and hang the bag from the hook. Scale is sensitive to 20 grams.
Ages 8+
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Disposable 60 x 15 mm dishes & covers. These dishes cannot be heated.
Ages 8+
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This complete guide to doing a pigeon dissection includes definitions of animal terminology.
Ages 11+
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Use this agar powder with water to create your own pure agar base! (no nutrients added)
Ages 12+
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Home Science Tools 4-pack AAA batteries, 1.5 volt, alkaline. Great for electricity and circuit projects!
Ages 6+
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All our lenses and circular mirrors are 38 mm in diameter. The focal length (f/l) is noted for each.
Ages 11+
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Supports crucibles, evaporating dishes or funnels on a ring support when heating to high temperatures.
Ages 11+
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Place this culture tube directly in an open flame to heat your substances! Made of high-quality borosilicate glass, this culture tube has a 10 ml capacity. 125 mm tall. 16 mm outer diameter. Receive one tube per order!
Ages 8+
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These No. 4 lab-grade corks fit our large 16 mm x 150 mm test tubes.
Ages 5+
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This is the iodine stain used for the Gram's bacteria staining technique.
Ages 12+
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These disposable test tubes are made of clear polystyrene plastic.
Ages 5+
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This is a 30 g bottle of carbon lumps, also know as charcoal. This chemical is flammable; please read warning labels carefully. Find the carbon formula, formula weight, and more below!
Ages 12+
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Special 6 mm diameter closely wound steel spring used to study the effects of potential energy and energy conservation.
Ages 11+
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This 30 ml (1 oz.) amber glass Boston round bottle is ideal for storing chemical solutions, most solvents, acids, and bases.
Ages 8+
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These #5 rubber stoppers are 23-27 mm diameter.
Ages 8+
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Use this mini magnetic compass for designating the direction of magnetic fields in magnetism studies or for making a simple galvanometer for electricity studies.
Ages 8+
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This basic candle makes a good light and heat source for experiments.
Ages 11+
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This thermometer jacket adapter allows you to use a standard lab thermometer in an inorganic or organic chemistry process while maintaining a fully glass enclosed system.
Ages 14+
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Packet contains about 15 seeds.
Ages 5+
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Use this 30 ml LDPE dropping bottle to dispense indicators and stains. Bottle includes a dropper tip and overcap.
Ages 5+
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Mosquito forceps have a serrated curved point to easily grasp and securely lock, providing excellent control.
Ages 8+
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This is a non-certified 100 g calibration weight for use in calibrating digita l scales.
Ages 11+
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Diffraction gratings are used separate light into its different colors.
Ages 11+
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We get it. Science can be messy. But Home Science Tools' products and service can handle it.
Our products are durable, reliable, and affordable to take you from the field to the lab to the kitchen. They won't let you down, no matter what they're up against. Whether it's (over)eager young scientists year after year, or rigorous requirements that come once-in-a lifetime.
And if your science inquiry doesn't go as expected, you can expect our customer service team to help. Count on friendly voices at the other end of the phone and expert advice in your inbox. They're not happy until you are.
Bottom line? We guarantee our products and service won't mess up your science study—no matter how messy it gets.
Questions? Get in touch with our Customer Service team.