Quick prototyping. Length 300mm(12") Female to female wires suitable for prototyping. These wires can be connected to any header with a 2.54mm(0.1") pitch. Handy for making wire harnesses or jumpering between headers on PCB's. They have 0.1" sockets on either end and fit cleanly next to each other on standard-pitch header. For best results, when plugging these in a line, have the sides with the 'silver latch bit' sticking out since that side is a tiny bit wider.