PCI-E Express 16X to 16x Male to Female Riser Extender Card Ribbon Cable 20cm - layer PCB bard designing. -1-slot PCI-E 16X riser card with normal ribbon cable. - high speed FFC cable is flexible for 1U, 2U, 3U chassis. - Support PCIe 1X card and 4X, 8X, 16X card ( only provide 1X speed).