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This package of plastic pulleys contains 25 each of 20, 30 and 40 mm diameter pulleys with 3.2 mm bores and one 10 mm pulley with a push fit to a 2 mm motor shaft.

Nine level conductivity meter shows the relative conductivity/resistance of liquids and solids. As the conductivity of the tested material increases, the number of glowing red LEDs will increase to a maximum of 8, which indicates a very good conductor. There will be zero glowing red LEDs if the material has a very low electrical conductivity (is a good insulator).

Individual spherical glass lenses.

Striking Images Capture Meiotic Recombination

Each pocket-sized volume contains hundreds of illustrations and descriptions of the most common, important, and striking examples of each type of animal, insect, or other specimen.

Ideal selection for use with a ray box.

Boomwackers are brighly colored plastic tubes tuned by length to musical notes.

View Sequence of Rock Layers In Different Locations

Unique Shapes Challenge Students’ Assumptions

Frosted acrylic lenses for optical experiments.

High Quality and Economical

Educational Materials, Mechanics, Application: Physics, Hooked Weight, 200g

A Staple For Optic Studies

Flexible, Insulated Wire.

Provide a concrete visual illustration of the Earth’s magnetic field, while demonstrating the “Thumb Rule” with this compass.

Individual spherical glass lenses.