ADP-45FE F ADP-45HE PA-1450-26 these models have two connector size. One is 5.5*1.7mm, the other is 3.0*1.0mm.This adapter connector size is 5.5 * 1.7mm.It is bigger than 3.0 * 1.0mm (please check the third connector size photos). Before you buy it, please check the connector size of your original adapter!!!!!! [Product Specifications]Input: 100-240V 50/60Hz, Output:19V 2.37A 45W, Max Output Power:45W,Color: Black, Connector size: 5.5*1.7mm,Power Plug Type: US Plug. [Compatible with Model]Delta Acer ADP-45FE F ADP-45HE D PA-1450-26. [Compatible with Model]Acer E5-721 E5-731 E5-731G E5-771 E5-771G ES1-411 ES1-512 ES1-711 TravelMate P276-M P276-MG. [Compatible with Model]Acer Aspire 3 A314-21 A315-42 A315-42G A315-54 A315-54K A315-57 A315-66 A315-68 A315-72 A317-51 Aspire 5 A515-52K A515-52KG A515-53K A515-53KG.