Ide ribbon cable, double connectors for two devices. For ata33 interface with 40-pin or 39-pin (40 wires). Total 18 long (6 and 12 inches between connectors). Oem bulk pack. In individual plastic bags. It works with all ide and eide devices such as hard disk drives (hdd), cd-rom, dvd-rom, cd-r, and cd-rw drives. Separate ide cable connections for hard drives and cd roms are recommended. Sharing ide cable between hard drive and cd rom may slow access to your hard drive.