Onite 2 PCS DC Plug Tips Female Connectors to Male Jack for HP Stream 11 13 14, Pavilion Envy Elitebook, (5.5x2.1mm to 4.5x3.0mm) Brand: Onite high quality, and good price. Used for external power source and on-board transformer Female 5.5x2.5mm to Male 4.5x3.0mm Adapter Converter Tip Package Contents: 2 pieces of Adapter Converter Tips HP Stream 11 13 14, Pavilion Envy Elitebook Dell Latitude Inspiron XPS Precision