... .9AInterior diameter:1.7mmExternal diameter: 4.8mm Compatible laptop models: HP/COMPAQ P/N: 325112-001, 324816-003, 324816 ... 001, 286755-001, 287515-001, ACCOM-C16, 432309-001Compatible Laptop Models: Compaq Presario 2100 Series :2100AP, 2100CA, 2100LA, ... DM656A, DM657A, DM957A, DM958A, DM959A, DM960A, DM997A, DM998A, DN837AHP Omnibook XT Series:XT276, XT375, XT412, XT4345QV, XT5300, XT5366WM, XT537QV, ...