This is a Standard 3.5" floppy size which you can put in front bay. 3.5" Internal Front Bay USB2.0 Hub is the easiest solution for expanding front excess 8port of USB 2.0 connection. Only a few simple steps， you can start enjoying accessing USB connection at your PC desktop front port. Features: Offer 8 X USB 2.0 port， Comply with USB2.0 High Speed specifications. Metal case Standard 3.5” Floppy Size， Easy To Install. Connect USB ports Cable to motherboard USB 10pin header. Connect DC 4Pin Socket Supply Power to motherboard for power Support Hot-swap Support XP/Vista/Win7/Win8 Package Content: 1 X Front Bay USB 2.0 Hub with a cable 1 X set of screws (Note : Photo attached is for reference only， it may be slightly varied in items of colour， shape from the actual item delivered from time to time) If you need 3.5inch front panel with combo card reader， click HUB-FPU24CR