[MingBen] Flexible E27 Lamp Holder European Standard Plug 180 Degree Rotation Adjustable Converters
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500pcs 5.5mm x 2.5mm Socket DC Power Plug PCB Socket Charger Connectors
http://photo-a2.blogspot.com/2018/09/500pcs-55mm-x-25mm-socket-dc-power-plug.html