(5-Pack) JacobsParts DC Power Pigtail Female Barrel Jack 6-Inch Wire 5.5mm x 2.1mm for LED Strip Light, CCTV Security Camera, DVR, and Other Low Voltage Applications Connectors: 5.5x2.1mm Female Barrel, bare wires Length: 6-inches / 15cm (including connector) Polarity: Center positive, Red (+) / Black (-)