uxcell 10 Pcs Panel Mounting 3 Terminals 2.1mmx5.5mm Female Jack DC Socket it is fit for most standard DC power device. With washer, easy to mount stability. Good for motherboards, system boards, and other such circuit boards. Ideal replacement for power supply connector, provides reliable connection. DC power jack socket 5.5 x 2.1mm, female, 3 terminals.