3.5 " to 5.25 " Floppy Mounting Kit Bracket Hard Drive DVD ROM to Floppy 3.5 " to 5.25 " Floppy Mounting Kit Bracket Hard Drive DVD ROM to Floppy Material: Plastic Fit any 3.5" HDD into your existing 5.25'' Drive Bay Maximize the internal space of your computer case for efficient usage Work with 3.5" internal card reader or USB hubs