Features: Brand new and high quality High-quality copper material ensures stable and efficient conductivity for 20cm U-shaped testing wires. Perfect for physics and electrical experiments. The coating on the wire provides extra protection against corrosion and abrasion, making it durable and long-lasting. Designed for students and professionals in need of reliable testing wires for their scientific experiments. Suitable for use in schools, laboratories, and at home. These testing wires are ideal for connecting circuit components, measuring voltage and current, and other electrical experiments. A must-have tool for anyone interested in exploring the world of physics. With its compact size and easy-to-use design, this U-shaped testing wire is a versatile and essential tool for any science enthusiast. Get yours today and start your scientific exploration! Specifications: Material: Copper Color: Black wire, Red wire (optional) Lengtn: 20cm Package Includes: 10 x Lead Cable note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.