Introducing the Icy Dock MB991IK-B 2.5" SATA/SAS Mobile Rack for use in 3.5" device bays. This product is constructed of heavy duty SECC metal to hold up in the toughest of conditions. It includes ventilation slots on the front, back, top and bottom for maximum airflow to keep both SATA and SAS drives running cool, and an LED is placed on the front of the device to give the user drive status at all times.