Bplus KZ-B21 (P21S-P21F) : High speed PCI-E Express Extender 1x Riser Externder Card PCIe x1 to PCIe x1 FFC (Flat Flexible Cable) Extender Support PCIe Gen2 , 5Gbps Flat Flexible Cable, Thickness 0.1mm (4mil) , Length 10cm (4inch), 20cm (8inch) , 30cm (12inch) Edge Free / Multi-lane PCIe Connector : Support x1, x4, x8 and x16 PCIe Cards