Description DC Socket Connector (PCB Mount) - Female Plug Barrel Connector Standard DC Socket which suites most of the standard wall adapters. Internal Diameter of 2.1mm with a center pole. Specifications Product type: DC power Socket Connector type: Female connector Pin counts: 3 Withstand voltage: AC 500VVoltage - Rated 24VDC Current Rating (Amps) 5A Colour: black Inner diameter: 2.1 mm Outer diameter: 5.5 mm Material: plastic and metal