... .5mm IBM. LenovoM316V/Max90W6.5*4.4mm(with1.4mm pin) Sony.FujitsuM418.5V/Max90W4.8*1.7mm Compaq, HPM519V ... ,Gateway,Toshiba,LiteonM619V/Max90W5.0*3.0mm(with1.0mm pin) SamsungM719V/Max90W5.5*2.1mm Acer,Compaq,Delta,HP ... ,Toshiba,LiteonM819.5V/Max90W6.5*4.4mm(with1.4mm pin) Sony M1020.0V/Max90W3 holes Dell M1218.5V/Max90W7 ... 5.0mm HP,Compaq Newest style multi-function with USB 120W universal ac adapter