... 9AInterior diameter:1.7mmExternal diameter: 4.8mmCompatible laptop models:HP/COMPAQ P/N: 325112-001, 324816-003, ... 2550AP, 2555AP, 2555US, 2560AP, 2565AP, 2580US, 2585USHP/Compaq Business Notebooks 1050v, nx9000, nx9005 Series: DC749A, DC750A, DC751A, DC767T, ... , ZE5185, ZE5200, ZE5279, ZE5300, ZE5395US, ZE5478CL, ZE5490US, HP Pavilion ZE5000 ZE5100 ZE5200 ZE5300 ZE5400 ZE5500 ZE5600 ZE5700 Series ...