Type: Removable Tray Module Specifications: Compatible Hard Drives: 3.5" SATA I / SATA II hard drives with 2.5" screw hole Dimension: 4.25" x 7" x 1" Weight: 1 lbs. Features: Tray module compatible with the following stroage subsystems: TR5M+B TR5UT+B TR8M+B TR8UT+B TR8U+B TR8X+B Aluminum design, finished in black. Hot-swappable design. Package comes with screws.