Commonly used as the power supply connector on ATX motherboards.
Two rows of 12 pins are broken out two rows of through-hole male headers.
Pair this connector with a standard computer power supply and you can source a number of different voltages (+3.3V, +5V, +12V, -12V, -5V) to your project.
DIFFERENCE NOTICE - Please allow 1-3mm measurement difference due to manual measurement and a certain degree of color difference caused by camera lenses, different phone screens, and different monitors.