The 9v Battery Snap Connector + DC Jack(Battery Connector Cap) comes with the best quality material. It is widely using for project purpose.
The 9V Battery Snap Connector with Power Plug provides the ability to conveniently use a 9V battery to power many common boards and modules such as the popular Arduino and compatible microcontrollers.
This plug is a very common barrel type with an outside diameter of 5.5mm and an inside diameter of 2.1mm. Cable length is 11 cm.