ELECTRODE STRIPS: Constructed using high- grade material, ensures it safety and can use it with confidence.FRUIT POWER EXPERIMENT SUPPLIES: easy to use in scientific projects. Before operation, you need to prepare lemons, or some vegetables and beverages to assemble the battery.METAL ELECTRODES: Improve childrenand ability to do things on their own, develop children' s imagination and creativity.ZINC ELECTRODE STRIPS: Through interesting fruit battery scientific experiments, parents can accompany your children to play and cultivate their science learning interest.COPPER FLASHING: Use along with copper electrode strip and pin- type wires, to build your DIY fruit battery.size: 5 x 2 x 0.8cmMaterial: Copper + zinccolour: As shownPackage Contents:10 x copper sheets10 x zinc sheetsOnly 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.