Features: Material: high-grade copper core. Each cable length: 20cm / 7.87-inch. Including 40-pin male to female jumper wires, 40-pin male to male jumper wires, 40-pin female to female jumper wires. The male ends meant for insertion into standard 0.1 quot;(2.54mm) female sockets and the female ends are meant for insertion into standard 0.1 quot;(2.54mm) male headers. The cables can be separated into single root as you request to do multiple connection. Computers and smart phone maintainance, Various prototyping, such as Arduino/Maker/3D printer control board, DIY experiment needs frequently, If the terminals does not damaged it can be reused, if damaged can also be used for soldering. Portable design, easy and safe to use. Applications: Work on a Raspberry pi breadboard projects, Raspberry pi robot build, Breadboard prototyping, Arduino and ky-040 rotary encoders. Insert onto the SW LED pin on the typical desktop computer mother board. Test bread boarding projects or for any breadboard experimenter. Package included: 1* 40-pin 2.54mm Male to Male Dupont Wire Breadboad Jumper Wire 1* 40-pin 2.54mm Male to Female Dupont Wire Breadboad Jumper Wire 1* 40-pin 2.54mm Female to Female Dupont Wire Breadboad Jumper Wire