... 4.External Diameter: 5.5mm SpecificationReplacement Laptop adapter for Thinkpad 16V 3.5A AC AdapterInput: AC100-240V (worldwide ... External Diameter: 5.5mmBrand New Replacement Product, works as genuine parts, 100% OEM Compatible!! Compatible Part Number02K6543, 02K6555, 02K6545, ... A30, A31, A31PThinkPad R30, R31, R32, R33, ThinkPad T20, T21, T22, T23, T24, T30, T40, T41ThinkPad X20, X21, X22, X23, X30 ...