the expresscage mb326sp-b brings to you our highly consumer-friendly enclosure made for anyone that requires high storage density. the mb326sp-b fits up to 6 x 2.5 sata/sas hdd/ssd (5mm - 9.5mm) into a single external 5.25 bay with the ability to hot swap for easy drive replacement. the expresscage name reflects the tool-less drive installation design that makes installing your drive just as simple as a tray-less device, and optional bottom tray screw holes are provided for extra protection and added stability. with dual 40mm cooling fans placed behind the unit and all around ventilation, your drives will stay cooler than the arctic. the fan speed slider switch lets you choose between high, low, or auto smart cooling, so you can set it based on your preference. key features supports up to 6 x 2.5" sata/sas hdd/ssd into a single 5.25" bay support sata 6gbps or sas single channel (requires sas host) hot-swappable bays for quick drive installation accommodates 2.5" drives with 5mm, 7mm 9.5mm height active power technology (apt) - only powers up if there is drive installed in the drive bay removable expresstray system for tool-less, easy installation comparable to tray-less designs optional bottom mounted screw holes for increased stability blue indicator led provided for each bay dual 40mm fan for drive cooling 3 pin fan headers to support many aftermarket fan upgrades 2 x 15pin sata power connection powers all 6 drives locking latch design for both 7 pin sata connector and 15 pin power adapter fan speed control for high, low, and auto (smart cooling) settings metal case with heavy duty abs tray and door latch designed for power users and system builder applications, mainly space saving and hot swap usage and for 2.5 hdd or ssd color black