These are 7.8"(20cm) long jumper wires terminated as male to female. Use these to jumper from any female header on any board such as Arduino processor. Multiple jumpers can be connected next to one another on a 0.1" header. Comes in one pack of ten jumpers (ten wires with different color).
 

We use these wires for everything! They work great with breadboards, Arduino, breakout board and really any 0.1" pitch prototyping board.