Connect two SCSI IDC50 CD/DVD or hard drives and supports the maximum speed. This improved-airflow rainbow-round internal cable is non-hooded type. It allows you to connect your SCSI devices with minimal clutter and is recommended for high performance PC and high-density rack mount servers. In addition to being coated with flexible material for better wiring protection, these cables reduce heat and save space within the CPU, and makes it easy to add or remove hard drives & add-on cards. (Connectors: 0, 20, 26 Inches; Color: Gray)