Use a bar magnet to move in the same direction so that the magnetic needles are arranged regularly. After the strip magnet is removed, this arrangement will not change. In this way, one end of the model becomes S pole and the other end becomes , simulating the magnetization environment. Features - Color: Random color - Material: Plastic. - Size: 2.80X2.80X2.60cm/1.10X1.10X1.02in. - The magnetic molecular model is an experimental equipment used to simulate the structure of magnetic magnetic molecules. - Use a bar magnet to move in the same direction so that the magnetic needles are arranged regularly. After the strip magnet is removed, this arrangement will not change. In this way, one end of the model becomes S pole and the other end becomes , simulating the magnetization environment. - Used to simulate the magnetic molecular structure of magnetization, explaining the phenomenon of magnetization and demagnetization. - Small magnetic needles are needles with a certain degree of magnetism. Or put the needle on the magnet and rub it several times to . - Adopted from material, it is durable and use. Package list: 16 x Magnetic Needles