Features PVC Insulated Protective Cover: The banana plug is made of PVC insulating protective cover, and the main body is nickel-plated brass, which is safe and durable for long-term use. Strong Connection Performance: The female-to-female banana socket jack connector is manufactured with high-precision technology, and the banana coupler has strong connection and good conductivity. Exquisite Workmanship: The banana plug extension adapter is exquisite in workmanship, stable in performance, easy to use, and safe to use. Application: 4mm Female-to-female adapter shorting plug is widely used in electronic instruments, industrial equipment, welding machinery, charging generators, automobiles, computers, communication products, etc. 4mm Female to Female: This 10PCS J.20009 banana plug coupler is 4mm female to female, rated for 30Vac‑60Vdc/Max.19A. Specification: Item Type: Banana Plug Coupler Model: J.20009 Material: PVC, brass Application: Wdely used in electronic equipment, industrial equipment, inverters, welding machinery, charging generators, ships, RVs, trucks, automobiles, separation and distribution of solar cells, hardware, electronics, electrical appliances, computers, power supply stability Compressors, game consoles, tape recorders, communication products Rated Voltage/Current: 30Vac-60Vdc/Max.19A Package List: 10 x Banana Coupler Package List 10 x Banana Coupler