... 2.5 mm , 3.5 mm , 6.3 mm 3.pole: 2 pole, 3 pole, 4 pole. Various stereo connector specification :1.male ... Sprial:BC/TC/CCS/CCA;0.10mm or 0.12mm4.Drain:7/0.10,7/0.12,10/0.10etc.5.Jacket:pvc. ... 6.Color: black, white ,etc.7.Length: 0.3mm-25m (for optional)8.OD:2.5-4.0mm ... : 300v DC min.3. 3.Insulation resistance: ≥ 5MΩ Min.4.Contact resistance: ≤ 5ΩMax5.ROHS or REACH. 3.5mm stereo plug to jack av cable