3.5" SATA II removable frame made of aluminum. Designed for a 3.5" SATA hard drive and fits into any standard 5.25" bay. Features a removable tray system and is hot-swappable. A security lock keeps data safe in the system. It includes a 40mm exhaust fan at the back. Ventilation openings at the front ensure high air circulation. The MB876SK-B is an internal enclosure and the first removable frame from Icy Dock equipped with their removable tray system. The device impresses with its aluminum casing, which provides optimal cooling and reliability, fits into all standard 5.25" drive bays, and protects your valuable data with an effective locking mechanism. To enhance cooling, there is a 40mm exhaust fan at the back of the device. The enclosure is compatible with most 3.5" SATA I & II standard drives and (with the optional 2.5" to 3.5" hard drive converter MB882) 2.5" SSDs and SATA drives. Additionally, the tray of all compatible Icy Dock systems can be exchanged, including trays from the MB559, MB561, and MB453/454/455 series.