The Black 3x 5.25" to 5x 3.5" Trayless SAS/SATA 6.0 Gb/s Hot-Swap Cage from iStarUSA is the third generation tray-less hot-swap hard drive cage. It supports the current transfer rate technology of 6.0 Gb/s (SATA I/II/III and SAS I/II) and is RAID ready. The hard drive cage also comes with an ultra-quiet cooling fan and adjustable fan speed control. The LED display lights feature a blue light to show drive activity. Heat dissipation is enhanced by a full aluminum construction and a 3.1"(80mm) fan. The metal key locks help secure your hard drives and prevent unauthorized access. Converting three standard 5.25" (133.3mm) drive bays into 5 usable hard drive slots, it is economically designed to maximize your investment.