These premium rainbow jumper wires are perfect for breadboarding, making wire harnesses, jumpering between headers on PCB's or basically any wiring project you can think of! The wires are 4" (100mm) long and come in a 'strip' of 40 (4 pieces of each of ten rainbow colors), that can be separated into the multiples of your choice if required.
They have 0.1" male header contacts on either end, fit cleanly next to each other on standard-pitch 0.1" (2.54mm) headers and clip neatly into breadboards. The best part is they come in a 40-pin ribbon cable. You can always pull the ribbon wires off to make individual jumpers, or keep them together to make neatly organized wire harnesses.