Qnap 2.5/3.5 Inches HDD Tray (SP-X20-TRAY) SP-X20-TRAY Plastic White HDD tray with black flat head machine screw x6 for 2.5" HDD & silver flat head machine screw x8 for 3.5" HDD Applied Model: TS-120/ TS-220/ TS-251/ TS-451