Coax Barrel Plug 2.1mm by 5.5mm 2 Way Splitter Coax Barrel Plug Splitter 2.1mm by 5.5mm - 6 Inch Zip Wire, Connectors, Switches, Power Cords & Accessories Standard 2.1mm connection size for our LED Flex Ribbon and Power Supplies coax, barrel, plug, adapter, 2.1mm, 2.1, 2.5, power, splitter, 2 way splitter