Item 1. The two plates are supported in two rigid uprights and driven by belt in opposite direction. 2. They are heavy, high resistance plastic with sectors of aluminium sheet. 3. Two leyden jars (condensers) made form corning glass and aluminium foil. 4. The whole body is mounted on a plastic base nicely polished. Principle: The operating principle of the machine is based on two counter-rotating disks made of insulating material. Each disk has several metal segments attached to it, called sectors. As the sectors pass one another, they induce a charge imbalance on one another. This imbalance is drained off at the collecting electrodes. Construction: A number of metal foil sectors are pasted on an acrylic disc. Two set of brushes are mounted on the charge collectors - one on the front and another on rear disc. When the discs are rotated, the brushes collect the electrostatic charge of the metal foil which is ferred and stored in the Leyden jar capacitor. When a very high voltage is achieved, electrostatic breakdown occurs and spark between the electrodes is seen and heard. Tips: The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Material: Metal+Plastic colour: As Shown Package Contents: 1 x Electrostatic Generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.