Double Ball Electroscope Fish Model they can be used to

they can be used to demonstrate attraction and repulsion

You get a set of 10 learning numbers from 0 to 9

Included: Cathode Ray Tube Magnetic Field Effect Deflection Crookes Tube with Rectangular Plate

durable base

Stainless tray use straight pins to position specimens in this slope-sided dissection tray

Double Ball Electroscope Fish Model they can be used toDouble Ball Electroscopes. Electroscope for demonstrating static electricity. Two pith balls suspended on unspun silk string to test for charged objects. Plated brass pillar for durability. Plastic base for display. Suitable for high school or college students, or ages 14 to 21 Premium Quality: Double Ball Electroscopes is made of high grade construction all the way through, excellent build quality and proven reliability across the range. Designed for