Features: Experience precise demonstrations of current magnetic field direction with our high strength magnetic needle. Crafted from magnet, this magnetic needle device offers high sensitivity and is easy to carry and store, making it a reliable tool for various educational settings. Suitable for physics teachers, students, and enthusiasts interested in electromagnetism, this physics teaching tool caters to users who seeks to deepen their understanding. Widely used for classroom teaching, laboratory demonstrations, science exhibitions, this magnetic needle oersted experiment instrument supports various learning environment. This physics teaching equipment not only aids in visualizing complex concepts but also enriches the learning experience through interactive engagement. Specifications: Component: Magnet Color: Black Redness Yellow Size: Approx. 10x10x12cm/3.94x3.94x4.72in Weight: Approx. 230 Package Includes: 1Piece Magnetic Needle with Display Holder note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color