This is a pack of TWENTY WHITE coloured Nylon 66 Sata Straight connectors + 100 pins to populate all 5 terminal spaces on each connector. This connector is used on the PSU leads to connect to Optical Drives, Hard drives, SSD Drives etc Please make sure you are confident to attach the wires correctly - so not only in the correct order (see diagram in one of the pics above) but also by either properly crimping your wires into the pins or soldering them in place. Failure to fix your wires properly or in the wrong order will result in a LOUD BANG, more than likely a bit of smoke and more than likely a dead PSU or worse PC!! we will not be held liable for failure of this item if all reasonable precautions for fitting and wire assembly etc have not been followed. Also available in packs of 2