Pith Electroscope Educational Product With Pithball ampoule filling and sealing machine principle "reviewCount":"17"}}]}

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number of cylinders

User-Friendly Design: Simple setup allows for quick adjustments

Mechanical Stage: The co-axial

Pith Electroscope Educational Product With Pithball ampoule filling and sealing machine principle "reviewCount":"17"}}]}pith ball Brand: WKM Features: Pith 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 Binding: Electronics Part Number: BSP255 Package Dimensions: 2. 0 x 1. 2 x 1. 2 inches