iStarUSA DAGE412U40DERD-3MS 4U 12Bay miniSAS JBOD Rackmount Chassis Red Support SAS I/II, SATA I/II/III Hard Drives Up to 12 Hot-Swappable 3.5" Trayless Drive Trayless Design LED Indicators for Power and Activity on Each HDD Tray 120mm x 1 Cooling Fan for Ventilation