Honbay&reg; Universal 28 DC Power 5.5x2.1mm Jack to 28 Plug Power Adapter for Notebook 100% Brand new and high quality Plug male diameter outside/inside(or pin) Used for external power source and on-board transformer 28 different interfaces more choices for you 1 set Multi-function DC Plugs for AC Power Adapter Notebook Laptop Universal 5.5x2.1mm Jack to 28 Plugs