Features: High efficiency square copper coil used for precisely electromagnetics induction, crafted with metal and plastic, ensures superior conductivity and long time durability. Constructed from high purity copper with exceptional oxidation resistance, this wire coil maintains stable function even under high frequency application, outperforming traditional fragile designs. Suitable for physics educators, engineering professional, and students requiring multifunctional electromagnetics experimentation tool for academic and technical project. Perfectly suited for laboratory demonstrations, classroom physics experiments, and prototyping electromagnetics principles in electronics development environment. This educational physics teaching aid combines sturdy construction with optimized electromagnetics responsiveness, delivering professional result across diverse scientific applications. Specifications: Component: Plastic + Metal Color: Blue, Cppper Size: Approx. 7.3x7.3x1.0cm/2.87x2.87x0.39in Weight: Approx. 120g Package Includes: 1Piece Oersted Experiment Wire Coil 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