These premium jumper wires are different lenghts. They have male headers on one end and female headers on the other end. They can be installed next to each other on a standard-pitch header. You can also pull the ribbon wires off to make individual jumpers, or keep them together to make neatly organized wire harnesses.
20cm Female to Male jumper wires- 40pcs
30cm Female to Male jumper wires- 40pcs
Very handy and decent length. Please make other connectors also available Pre crimped like these.
Items work perfectly well