ITEM NAME:10Pcs 12V 5.5x2.1mm Male + Female DC Power Socket Jack Plug Connector Cable Wire.5pcs x 12V DC Power Female Jack Connector Cable. 5pcs x 12V DC Power Male Jack Connector Cable. The DC male pigtail provides a simple solution for power connectivity. DC 5.5 2.1mm. Black and red wire jackets indicate polarity.