Features: This magnetic physical teaching instrument combines both magnetization and demagnetization functions, perfect for physics experiments and magnetic materials studies. Two Size Combination: Includes large and small magnetizers to accommodate various experiment needs, from basic teaching to advanced research, physics experiment tool. Easy Operations: Simple and intuitive design allows beginners to quickly mastering its use, enhancing learning efficiency in classrooms and labs, educational science equipment. High Magnetic Strength: Made with efficient magnetic materials to generate strong fields instantly, ensuring precise and effective experimental results, magnetic teaching aid. Quality & Portable: Lightweight yet sturdy ABS construction offer long lasting performances and easy storage, ideal for school labs and scientific activities, physics lab equipment. Specifications: Materials: ABS Color: As The Picture Shows Size: Small/Large (Optional) Small Size: approx.12.4x7x7.5cm/4.88x2.75x2.95inch Large Size: approx.16x8.7x9.2cm/6.29x3.42x3.62inch Package Includes: 1Pc Science Experiment Tool note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!