20 Pin USB 3.0 female to 9 Pin Male USB 2.0 Motherboard Cable Adapter 480Mbps
The cable can let the USB 3.0 20 pin device connected to the USB 2.0 motherboard, such as CD-ROM, floppy drive panel. If you need 20 Pin USB 3.0 Male to 9 Pin female. Buy from: Here. - 19 pin USB 3.0 feMale to 9 pin USB 2.0 male.