... :1.male,female.2.O D: 2.5 mm , 3.5 mm , 6.3 mm3.pole: 2 pole, 3 pole, 4 pole.4.shell: gold plated,Ni-plated.5.Color:black ,blue.Cable ... )8.OD:2.5-4.0mm(for optional).Quality :1.100% open or short test;2.Withstand voltage: 300v DC min.3. 3.Insulation resistance ... : ≥ 5MΩ Min.4.Contact resistance: ≤ 5ΩMax5.ROHS or REACH. 3.5mm stereo plug to ...