... Brass Spring: Beryllium copper Electric current :60-80A 4,4.0 mm - gold plated Male and female of the Connector ... Spring: Beryllium copper Electric current :100-180A6,6.0 mm - gold plated Male and female of the ... ten years1.Quality control : our defective products rate is 0.01%2.Economically priced ,exquisitely made.Experienced & responsible ... 3.5mm,gold,swivel,big,parkard,2p,mini,dean,banana,plug