A plastic test tube containing black ferromagnetic fluid with a silver magnet stuck to the outside of the test tube to illustrate its magnetic properties
A plastic test tube containing black ferromagnetic fluid with a silver magnet stuck to the outside of the test tube to illustrate its magnetic properties

Mini Lab Test Tubes - Ferromagnetic Fluid

Regular price $7.95
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Make your very own ferromagnetic fluid and experiment with magnets with this easy-to-use test tube kit.

Each test tube contains a bag of special magnetic powder and a strong magnet, so when you suspend the powder in a liquid, you can place the magnet near the tube and watch what happens!