EISCO-PH0894 Pith Electroscope on Plastic Base audio Package Includes 3 Pieces of

Package Includes 3 Pieces of Camera Lens Cap Keepers

the screw is a perfect replacement for your drum

76 x 3 x 6

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EISCO-PH0894 Pith Electroscope on Plastic Base audio Package Includes 3 Pieces ofEISCO PH0894 Pith Electroscope on Plastic Base EISCO pith electroscope is used to demonstrate static electricity. The electroscope has two pith balls suspended on unspun silk threads which are attached to a pillar to test for charged objects. The pillar is made of plated brass for durability, and is mounted on a plastic base for display. Brass is corrosive resistant, ductile at high temperatures, and has a low magnetic permeability. The electroscope