Coolmax CD-310 Series is a portable 3.5 HDD Aluminum External Enclosure. This is specially designed for high capacity hard drives. This new model has new and improved features which were added to ensure optimum enclosure reliability. High-Tech pull-out tray with anti-shock design ensures stability and better heat dispersion. Additional vents on the back panel for better cooling makes this model one of the best enclosures in the market today.