40 pieces of the 20cm, 1. Female to Female- 40 pcs, colorful Dupont cables jumper wires in one set will be sold together Female sockets and the female ends are meant for insertion onto standard 0.1 inch (2.54mm) male heade The cables can be separated to form an assembly containing the number of wires you require for your connection and to support non-standard odd-spaced headers Soldering is not required, Each cable length about 20cm or 8-inch, Through the pin connection, without welding, fit for fast circuit test, Made of high-grade copper wire material for safe and durable to use and flexible wit