Model: GX16-2PIN. GX16-2PIN Plug polarity:1 for "+",2 for "-". Material: OCC Single crystal copper. DC Plug Size: 3513 (3.5 1.3mm) / 4017 (4.7 1.7mm) / 5521 (5.5 2.1mm) / 5525 (5.5 2.5mm). DC Plug: gold-plated.
eBay