Yueton 3 Packs 20cm Multicolored 40 Pin Male to Female, 40 Pin Male to Male, 40 Pin Female to Female Breadboard Jumper Wires Ribbon Cables Kit 40-pin male to female wire + 40-pin male to male wire + 40-pin female to female wire High quality copper wire material, safe and durable to use Length: approx 20cm Great for electronic project and Arduino product The cables can be separated to form an assembly containing the number of wires you require for your connection