5.5mm x 2.1mm Female to 5.0mm x 3.0mm Male Plug Jack DC Power Adapter Connector
Male Tip = Outer tip size - 5.0mm, inner tip size - 3.0mm (inner pin 1mm). Female Tip = Outer tip size - 5.5mm, inner tip size - 2.1mm. Type = Adapter converter. 1X Connector. Security Products.