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