Quality 40 premium Male To Male 20cm jumper wires in a single unit. The wires being bound together gives you the option to peel off single ones as you need them or to create custom sized wire assemblies. If you need 6 wire bundle you can peel off those 6 and they will stay together and keep your circuit nice and tidy. The colors alternate every 10 wires so its easy to follow where each wire begins and ends. The pin housings are 2.54mm (0.1in) standard width so they line up perfectly on your Arduino pin headers, your breadboard, and anything else that matches the standard.