"Power Extension Cables from Cables To Go extend the reach of your existing 5.25 power cables. Easily connect hard drives, cd-roms, cd-rws and more to your computer's power supply. These cables meet or exceed industry standards. Don't trust just any cable to power your devices. Connector: One 4-pin Male Socket to One 4-pin Jacket Female. Extend the reach of your existing 5.25 power cable. Designed for Hard Drives, CD-ROMs, CD-RWs, Tape Drives, Fans and more."