CDCP21S CDCP21S Feature DC Plug (2.1 mm) to Socket Connectors Examples of Use Conversion from DC Plug (2.1 mm) to Socket Connectors Product Attributes SeriesMED CC1st ConnectorDC Plug (2.1 mm) [PDF] (MP-121C)Center contact : Red WireSleeve : Black wire2nd ConnectorSocket Connectors [PDF]Length150 mm