NEW ORIGINAL OEM AA-151AD 15V AC 1A UK Plug AC Adaptor - 5mm Barrel
2.1mm ID and 2.5mm ID are particularly easily confused. The table below shows the most commonly used variants. Concentric Barrel Plug. 5.0 2.1 8-14. 5.0 2.5 8-14. 5.5 2.1 8-14. 5.5 2.5 8-14. 6.5 3.0 8-14.