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Eisco Labs Ebonite Rod Proof Plane with 1.5in Diameter Brass Disc

Original price $76.99
Current price $7.99
  • Brass disc with ebonite rod attached
  • Height of item: 3.5 in
  • Diameter of disc: 1.5 in
  • Rod diameter: 9mm

The sturdy, 9mm ebonite rod proof plane, with its 25mm metal disc and insulated handle, is an ideal tool with which to transfer small amounts of energy from a charged object in order to study the distribution of charge.