SNANSHI 9.5mm Second HDD Caddy 2nd SATA 2.5" Hard Disk Drive SSD Enclosure for CD DVD-ROM Optical Bay Fast & Reliable connection in laptop, just as the primary HDD The thickness of this adapter is 9.5mm.Universal Optical Bay 2nd HDD Adapter This caddy accepts 2.5" SATA (Serial ATA) HDD only You might need to use the bracket or face plate of your existing optical drive The Universal SATA-to-SATA Caddy is compatible with laptops that has a 12.7mm-thick / high optical bay with a SATA interface.