quality construction for reliable connections 4mm stackable banana plugs with professionalgrade build multistrand copper wiring for conductivity colorcoded connectors for quick identification Safe and durable use PVC insulation provides full protection during use reinforced strain relief keeps wires intact nickelplated connectors resist corrosion and wear Versatile and compatible suitable for connecting power supplies, multimeters, and lab equipment compatible with any 4mm banana jacks ideal for electronics experiments and prototyping Practical features for efficient work stackable plugs allow multiple connections at once springloaded contact points maintain a secure connection flexible cable resists tangling and makes setup easier Specifications in brief 4 mm banana size copper multistrand conductors PVC insulation nickelplated connectors Use scenarios bench power supply and multimeter setup for voltage and current measurements quick test rigs for electronics experiments, enabling rapid swapping of components classroom or lab demonstrations, enabling safe, repeatable circuit connections