This is a battery holder model made of copper material. It has reasonable design and practical functions. It is designed to help you better demonstrate the basic principles of electricity and the working principle of simple circuits, so that you can better conduct experiments or Receive relevant knowledge. This is a very vivid and practical model, and it will be a good choice for your teaching model. Features -Color: Black. -Material: Copper. -Size: About 7.50X5.50X4.00cm/2.95X2.16X1.57inch. -It has a wide range of application scenarios and is very suitable for physics teaching demonstrations in schools. -It is mainly used to help you better show the basic principle of the pad and the working principle of simple circuits. -Your child can use the teaching model to practice at home and the D-wiping operation, which is conducive to cultivating children's creativity and intelligence. -The battery holder is made of highly conductive copper connecting wires, which can be connected in parallel or in series quickly. -The battery holder is convenient for demonstration and has a certain educational warning effect to prevent your children from playing with actual electrical equipment around the house. Package list: 6 Holders