Large Needle Electroscope, 1.5lbs, 7.0x6.0x4.0 in, ideal for classroom demonstrations of electrostatic principles, A light-weight metal vane, used as a pointer in the electroscope. A transparent scale, provided to measure the angle of the deflection
Magnetic Field Chamber Height: 4.75in Tall, Od: 3.25in, Idr: 0.75in, Magnet Not Included, Great For The Classroom. Extremely Useful For Students To Visualize Magnetic Fields In Three Dimensions, Instead Of The Usual Two Dimensional Of Most Iron Filings Field Visualizers