Goupchn - Make somthing different. At Goupchn, we strive to provide high quality tools and accessories that inspire our consumers to live a more convenient and enriched lifestyle. Our unlimited passion for innovation and solutions drives us to move forward. We have strong belief that only if we have a deep understanding of people’s needs and desires, we can make our products become different, which may make your life different. Features and specifications: Specifications: Material: Copper Plug size: 4mm Suitable for: circuit testing Length: 1 m Key features: Can be used in electrical or laboratory electric testing work Useful for connecting components to wires Insulated plastic boots covers for safety and easy installation Ideal electronics component for testing electronics with multimeters and other instruments Five colors for easy differentiation of measurements