Hanvex HDX20 20ft 2.1mm x 5.5mm DC Plug Power Adapter Extension Cable, 18AWG Heavy Duty Cord for 12V, 24V LED Strip, Lighting, and more Hanvex Heavy Duty 2.1mm x 5.5mm DC Plug Extension Cord, Male to Female Cable Specs - 20ft, 18AWG, UL 2464 (UL Component) Connectors - Female: 2.1mm x 5.5mm jack. Male: 2.1mm x 5.5mm barrel plug. Recommended for DC power 3 volt to 36 volt. Max load 6.5amp or less This cable will only work with power adapter with 2.1mm x 5.5mm plug and not other sizes.