... /3.75A,16V/4A,for Fujitsu 16V/3.36A,etc.B. 5.5*2.5mm for HP,for compaq,for Acer,for gateway ... ,for IBM,for Asus,for Liteon,for NEC, 19VC. 3.5*1.725mm for Sharp 22V/1.8A,22V/2.04A ... .7mm for HP/Compaq,NEC, Asus 19VF. 5.5*2.5mm for IBM 16VG. 5.5*3.0mm for Samsung 19V/3.16A,19V ... of them. Fits for :For HP: 5 hole with prolate headFor Dell: 7.4*5.0mm with Pin insideFor Lenovo/IBM: 7 ...