These Female/Female Extension jumper wires are great for making connecting sensors or jumpering between headers on PCB's. These premium jumper wires are 7" (177.8mm) long and come in a 'strip' of 40 (4 pieces of each of ten rainbow colors). They have 0.1" Female header contacts on both ends. They fit cleanly next to each other on standard-pitch 0.1" (2.54mm) header. 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.
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