Features: This electrostatic friction rod kits with a simple structure, easy to use and store. This friction electrification experiment set is guaranteed to spark curiosity and inspire a love of science for students. Perfect for educational and scientific research purposes. The physical experiment set can improve their physicslearning skill. This interesting electrostatic friction rod kits is not only can improve their physics learning skill, but also can improve their hand-on ability. Specifications: Component: Plastic Length: about 16cm/6.30'' Package Includes: 1 Set Friction Electrification Experiment Set note: Please allow 1-3cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item.