multi cooling hole design, double drawer, and 4 25 inch hard disks can be installed at the same time. Adopting the integral design, the exhaust air space below facilitates better heat dissipation. colour:black Material:Aluminum alloy size:8x6.5x1.5cm Package Contents: 1 * HDD bracket 1 * Screw pack Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Support SATA and IDE port; fit for HDD and SSD; 2mm thick aluminum alloy; precise molds press forming. Usually, there are several optical drive bays of computer case and most of them are not used. This hard drive can install your 2.5 inch IDE / HDD / SSD to the optical drive bay, expanding storage space, effective utilization. 2mm thick aluminum chassis, hollow design and open installation provide good heat dissipation for hard drive, protect hard drive and prolong hard drive's useful life. 2mm thick chassis with solid and stable structure keeps the shape even in high temperature, uneasy to be scratched. perfectly fitting with the optical drive bay, accurately locating the site of case, hard drive and screw hole, easily expanding storage capacity.