Icy Dock ToughArmor MB607SP-B full metal quad bay 2.5" SATA 6Gbps hard drive or SSD hot swap rugged mobile rack cage for use in a single external 5.25" bay. The MB607SP-B is predicated off the incredibly popular ruggedized mobile rack MB994SP-4SB-1, while taking its general concept, but built with cost effective structure without sacrificing anything in the way of strength. For better compatibility, the original 4 pin power connector has been replaced with a more, popularly used, 15 pin SATA power connector, and reducing cable clutter. The MB607SP-B takes 4 x 2.5" SAS/SATA HDD/SSD from 7mm to 15mm height, and supports hot swap for quick and easy drive replacements. The single 40mm cooling fans has an additional 3-Mode Fan Speed control, allowing the best flexibility - Turn off / low when using SSDs and high when using mechanical SATA hard drives. The MB607SP-B is constructed of rugged robust metal to survive the most demanding conditions making it a perfect storage upgrade kit for Medical & Military systems, IPC, embedded system, and industrial PC.