Power test lead 4mm banana plug wire $ 4.62 Length: Regular 1 meter 4mm male to male plug, can be continued 4mm banana plug, spring head shape, pure copper. Material: AGG (silicone) Material: pure copper Thick wire outer diameter: 4.0mm Test short-circuit current: 12A Sheath Material: Silicone Soft Sheath Tail aperture: 4mm