Package included: 2X 40pin male to female breadboard jumper wires, 2X 40pin male to male breadboard jumper wires, 2x40pin female to female breadboard jumper wires | The breadboard jumper wires 40 PIN ribbon cable, easy to identify each wires in your DIY or prototype;Fast circuit tests without soldering. Comes with 10 colors to easily distinguish chart connections. | The Jumper wire PVC material; insulated and flame retardant, high temperature resistant wire; safe and durable; small pins and sockets at both ends of the wire, no need to solder, plug and play, easy to connect when conducting circuit experiments | The Jumper Dupont cable can be used for connection during circuit experiments and also for pin extensions of the experimental board for additional experimental projects. Very secure connection to the pins, no soldering required, also for fast circuit testing | If you have any questions, please feel free to contact us