Product details28pcs/set Universal Laptop DC Power Supply Adapter Connector Plug AC DC Charger Connectors Notebook Power Adapter Converter#50Features:1.28 in 1 set Multi-functional DC Plugs for AC Power Adapter Notebook Laptop Universal2.d for external power source and on-board nsformer3.5.5×2.1mm Female to 28 multi-type Male Plugs.Specifications:Male Plug Diameter outside/inside(or pin):7.9mmx1.0mm7.4mmx1.0mm round7.4mmx1.0mm octahedron6.0mmx3.0mm6.0mmx1.0mm5.5mmx2.5mm5.5mmx2.5mm5.5mmx2.5mm5.5mmx2.1mm5.5mmx2.1mm5.5mmx2.1mm5.5mmx1.7mm5.0mmx2.5mm5.0mmx2.1mm5.0mmx1.0mm5.0mmx1.0mm4.8mmx1.7mm4.8mmx1.7mm4.0mmx1.7m.5mmx1.35m.0mmx1.0mm2.5mmx0.7mmx10mm2.5mmx0.7mmx8mmfor 4pin female3pin female3.5mm mono plug2.5mm mono plugPackage Included:1 x Laptop DC Power Adapter