Features: 1.[Easy Operation] Tool free and screw free pull out, easy to replace the hard disk, perfectly fits the 5.25inch optical drive box, and the semi open design helps the hard disk to dissipate heat. 2.[Lightweight Compact] Made of high quality ABS plastic and stainless steel, and supports 1 3.5inch hard drive, which not only expands storage space, but also saves idle disk space. 3.[Practical Usage] Using an idle 5.25inch optical drive, it can support 3.5inch serial hard disk without capacity limitation, which is convenient and practical to use. 4.[Multi Purpose] Multiple hard disk boxes can be installed in your case, and you can also use the hard disk box to make various operation startup disks, convenient for management and operation. 5.[Wide Application] Support the main capacity of the large capacity hard disk built in chassis 5.25 inches with the drawer box, and support all 3.5inch serial hard disks. specification:Item Type: Hard Drive Bay Material: ABS, Stainless Steel Applicable Hard Disk: 3.5inch SATA/HDD LED Indication: Hard Disk Status Light Blue, Hard Disk Storage Red Output Interface: SATA 7pin15pin Power Interface Hot Swap: Support PackageList:1 x HardDriveBay 4 x Screws NoteThis product does not contain hard drives.