introducing the icy dock mb994sp-4s quad bay 2.5" sata/sas mobile rack for use in a single 5.25" device bay. this product is constructed of heavy duty 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 each drive tray to give the user drive status at all times. dual 4-pin power connectors are used to ensure a consistent power supply to all 4 drives, whether they are low power ssd s or power hungry 15000 rpm sas drives. also included are dual 40mm cooling fans to keep the drives running in at optimal temperatures in even the most intense applications. the mb994sp-4s utilizes our brand new ez slide mini trays, making drive interchangeability and maintenance completely hassle free. the trays are built using full metal so that they are durable for many lifetimes, but will not weigh you down when transporting your data from system to system. and featuring a full cage design, the added top drive cover provides added protection while moving the drive. the trays are also designed to accommodate 9.5mm, 12.5mm, and 15mm drives giving you the ultimate universal 2.5" hot swap bay. utilizing its small form factor, the mb994sp-4s is perfect for use in industrial pcs, servers, or any small form factor case where 5.25 bays are limited and large drive capacity is needed, especially compact raid 5 systems. it is built to function in the most demanding environments including military and law enforcement deployment, as well as manufacturing conditions such as embedded control systems and factory automation systems. the heavy metal design makes it ideal for placement in rugged environments. model number : mb994sp-4s color : matt black host interface : 7 pin sata x 4