CHIPAL Aluminum 9.5mm 2nd HDD Caddy SATA to SATA 3 2.5" SSD HDD Case For Apple Macbook Pro Air 13" 15" 17" DVD/CD-ROM Optibay Brief Introduction: 1. Brand new and Aluminum Material ; 2. The thickness of this adapter is 9.5mm. 3. Internal Interface: SATA (for 2.5" SATA HDD/SSD). 4. External Interface: SATA. 5. The 2nd Hard Disk Drive Caddy / Adapter to bring you new maximum data storage flexibility. With 6. the second HDD in your Laptop, 7. You can speed to backup important applications and critical data (Simply remove your SuperDrive and put the Caddy (with the added hard drive) in its place. Key Features: 1. Plug & Play 2. Fast & Reliable connection, just as the primary HDD. 3. Fully integrated into Laptop, no cables / PSU / software driver needed. 4. Dual boot, Support installation of 2nd Operating System on the 2nd HDD and boot selection. 5. There are 4 screws inside the caddy, more stable for HDD/SSD installation; 6. Protective Switch: 2 Channel; 6. Adopt SATA III chipset, support SATA I & SATA II & SATA III; 7. Suitable for 2.5" 7mm / 9mm SSD/HDD. 8. Compatible for MacBook (Pro/Air) 13" 15" 17" Unibody which has a 9.5mm thickness SuperDrive with SATA interface. Package List: 1 x 9.5mm HDD Caddy 1 x Screw Driver 2 x Screw