Features 1.The 4mm banana plug extender is easy to connect and use without tool assistance. 2.It has good mechanical and electrical properties and long service life. 3.Selected high‑quality PVC materials, fire‑resistant, flame‑retardant, durable and durable. 4.Banana plug extender, the length is about 42mm, stable connection and high reliability. 5.Exquisite workmanship, small and light, suitable for electric power numerical test. Specification Item Type: Banana Plug Coupler Material: PVC Purpose: Electrical Numerical Test Color: Red, Black Model: U22 Length: Approx. 42mm / 1.65in Outer Hole Diameter: Approx. 6mm / 0.24in Inner Hole Diameter: Approx. 4mm / 0.16in Package List 5 x Red Banana Plug Coupler 5 x Black Banana Plug Coupler