Data Sheet WIKIPEDIA Reference DC Power Plug For Dell & HP Commonly used on power supplies for Dell & HP laptop computers. It can be used on 2 wire or 3 wire power cord. Rating: 18.5V - 19.5V @ 4A Max. Outer Diamter: 7.4mm Inner Diamter: 5.0mm Center Pin: 0.6mm Additional Model #'s 70-274 274 UPC: 038975002743