6 conductor flat ribbon cable, 15 cm in length, with 6-pin (2x3) female IDC connector mounted on each end. The connector has 2.54mm pin spacing.

This type of ribbon cable is used by some newer types of Atmel AVR in-system programmers and development boards, like the AVR Butterfly.

If you need length other than 15cm, you can make your own cables by purchasing the cable and connectors separately.