14 AWG, 8 mm Barrel Length Ferrule Connector - Hi-Line Inc.
Amazon.com : 20Ft 14AWG 12V DC Extension Cable DC 2.1mm x 5.5mm 5521 Power Supply Adapter Flat Extender Cord,Female to Male Wire for CCTV Security Camera,IP Network Camera,DVRs and More Devices (20Ft) :