Reliable 4 mm test leads designed for a wide range of experimental devices, instruments and electronic products. Built to provide secure connections, consistent signal transfer and long-term durability for hobbyists, educators and technicians. Key benefits Secure, standard connection: Standard 4 mm banana interface with a broad contact area for a firm, low-resistance connection to common test sockets and binding posts. Stable conductivity: Brass banana plugs deliver consistent electrical contact and fast signal transfer for accurate measurements and testing. Flexible and safe: Durable PVC insulation remains flexible under bending and stretching, protecting conductors and reducing strain at connection points. Versatile use: Suitable for benches, lab equipment and field work — reduces connection failures and intermittent readings that slow projects down. Important attributes Connector size: 4 mm standard banana plug interface Plug material: Brass banana plugs for reliable conductivity and mechanical strength Insulation: Flexible PVC for durability, safety and ease of handling Function: Test leads for connecting meters, power supplies, instruments and other electronic devices Typical applications Electronics hobby projects and prototyping: Quickly connect components, power rails and measurement equipment on the workbench. Education and lab testing: Use with multimeters, power supplies, function generators and student lab setups for dependable classroom experiments. Repair and troubleshooting: Make firm temporary connections during device diagnostics, component testing and circuit repairs. What this solves Eliminates intermittent contacts and poor readings caused by loose or low-quality leads. Preserves signal integrity during measurement and testing due to solid brass contacts. Reduces downtime and lead replacement with flexible, strain-resistant insulation. Use these 4 mm brass banana test leads whenever you need a dependable, easy-to-use connection between instruments and electronic devices.