Kostal professional-grade insect pins are excellent quality.

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A 2' section of flexible clear vinyl tubing.

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These 10 ml polypropylene cylinders have excellent chemical resistance.

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Single throw, single pole knife switch. Has screw terminals to connect wires.

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This basic glass pipet is also known as an eye dropper or pipette.

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This small magnifying glass has a 2" optical glass magnifying lens and a sturdy plastic handle, making it an excellent handheld magnifier for kids of all ages.

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See light refract into miniature rainbows with this equilateral glass prism.

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The Washington School Collection is a very popular rock and mineral collection used in many schools around the country.

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When working with chemicals or projectiles that can splash or enter the eye, it's important to develop a habit of always wearing the proper eyewear. These wraparound, impact-resistant safety goggles are an excellent choice!

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This 60ml syringe can be used as a simple mini vacuum or air pump or for air pressure experiments.

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These 50 ml HST beakers are a great value.

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Our plain preserved Lubber grasshoppers are large 3" Grade A. Genus & species are typically Romalea microptera.

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This 600 ml PYREX low-form Griffin beaker is used in professional labs. It is made from low expansion, Type 1, class A borosilicate glass that can be heated directly in an open flame.

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This value-priced pack contains five of our Home Science Tools Erlenmeyer flasks, ranging from 50 ml to 1000 ml.

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These nickel-plated T-pins are ideal for pinning dissection specimens.

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These 100 ml Home Science Tools beakers are a great value.

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Any aspiring geologist will love this set of 9 Mohs Scale of Hardness minerals.

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A spring scale measures weight or force when an object is hung from its hook.

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Pack of two extra large test tubes, 20 x 150 mm.

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This rock tumbler refill kit is pre-measured for a 3-pound rotary rock tumbler. Get four stages of grit: coarse, medium, pre-polish, and polish.

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These 400 ml HST beakers are a great value.

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This 50 ml polypropylene cylinder has excellent chemical resistance.

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Get every student in your class involved with this set of 60 clear, unbreakable giant test tubes.

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Plastic base designed to fit all our miniature screw base bulbs. Perfect for exploring electricity and circuits!

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These nitrile gloves are stronger than typical latex gloves and perfect for those with latex allergies.

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This is an economical collection of 35 mounted and labeled 5/8" specimens.

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Wide rounded serrated tips with gooseneck shank.

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These sharp, fine-pointed scissors are an ideal tool for most dissections, such as a frog.

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This high-quality seven-piece acrylic lens and prism set is useful for teaching a wide variety of optical principles. You get three lenses and four prisms.

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This 50 mm metal pulley is mounted in a clamp that can be attached to any board or table top up to 3 cm (1.18") thick.

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This high-quality 6" x 9" plant press is great for fieldwork because of its small size.

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This 250 ml PYREX low-form Griffin beaker is used in professional labs. It is made from low expansion, Type 1, class A borosilicate glass that can be heated directly in an open flame.

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This plain preserved anole (lizard) specimen is large enough to see all the internal organs and external structures. It is great for a dissection lab experience at a low cost and will give your student a memorable life experience.

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Already have a rock tumbler? This professional quality Rock Tumbler Refill Kit, Brazil Mix gets you started! Get 2 lbs of lapidary rough, 4 stages of pre-measured tumbling grit, and the 12-page HST rock tumbling guide.

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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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30 g bottle of sodium chloride, also known as salt. Sodium chloride is often used in experiments demonstrating ion properties; see a variety of project ideas below! This bottle is in crystalline form.

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