... 7.4*5.0 with pin 1.Models:for HP 18.5V 3.5A 2.Plug spec:7 ... 5.0 3.Warranty:1 year laptop adapter for HP 18.5V 3.5A 7.4*5.0 ... with pinReplacement for HP AC AdapterInput: AC100-240V (worldwide use)Output ... , 6720s, 6820s, 6910p, 8510p, 8510w, 8710p, 8710w,Compatible Part Numbers: 381090-001 381090-001 384019-001 384019-001 ... 418872-001 463552-002 463958-001 laptop adapter for HP 18.5V 3.5A 7.4*5.0 ...