Features: (1) Unique outward appearance design Industrial grade aluminum drive tray handle device Defer to the customer demand change color of drive tray handle Recognize the Raid position using rubber cap Fiber optical drive tray status indicator   (2) Effective cooling system 4 x 8cm hot-swappable system cooling fans with status monitor 2 x 8cm ball bearing fan on rear to optimize airflow   (3) Firm main body structure & maximum drive capacity Durable handle may draw out more than 10,000 of times 3.5”hot-swap x 16, internal 3.5”x 2, slim DVD x 1 single / multilane SATA / SAS backplane option Front access USB connector x 2, 1394 IEEE x 2   (4) Easy installation and maintenance Support up to EATX ( 12” x 13”) Manage Cable in order Extractable fan module bracket provide elbowroom assembly Options for 14 slot rear plate   Specification: Model NO.      U3017M2000 Standard EIA-RS310D Dimension (W x D x H)   481mm x 660mm x 3U (18.9” x 26” x 3U) Material  SGCC / 1.2mm thickness Backplane       SATA 3G, SAS, SATA Multilane M/B Extended ATX ( 12” X 13”) Drive bays       3.5”hot-swp x 16, internal 3.5”x 2, slim ODD x 1 Coolings  4 x 8cm hot-swappable cooling fans (middle) + 2 x 8cm cooling fan (rear) Indicators       Power, Fan Failure, HDD LED Controls  Power on/off, system reset, USB port x 2, 1394IEEE port x 2 Power Supply 2U single PSU / 2U Redundant PSU