This is Female 2.15.5mm for DC Power Jack Adapter Connector Plug For CCTV Camera. Simple & Professional appearance for power cabling. Easier for camera installation saves time and assures secure cable connection. No electrical tap, No splicing, no crimping, but only a small screwdriver.

Female Jack Description:
5.5mm x 2.1mm Female power plug connector.
The external diameter of the plug: 5.5mm.
The internal diameter of the plug: 2.1mm.
Dimension: 38mm(L) x 14mm(W) x 13mm(H