2.5 inches SATA 2nd HDD/SSD HARD DRIVE SATA to SATA caddy Tray for 9.5mm Laptop Universal CD/DVD-ROM Optical Bay Slot Specifications: Uses 2.5 SATA hard drives HDD Interface: SATA (2.5 sata or ssd drives). Laptop/ Mother Board Interface: SATA. Package Contents: 1 x Hard Drive Caddy