3.5" to 5.25" Drive Bay Computer Case Adapter Mounting Bracket, Metal Body, Plastic Bezel for USB Hub/Floppy/Card Reader
This is a kit that allows you to convert any 3.5" device to a 5.25" drive space on your computer case. It is usually used for floppy drives, but you can use them for any 3.5" device that you want to put into a 5.25" space. It includes a 4 pin to floppy adapter and screws. The tray is made of metal and the black bezel is made out of plastic.