Each individual length of these cables has been tested to ensure that it is capable of delivering the full 6.0Gbps/channel (18Gbps total) bandwidth required by the latest HDMI specification. Once the cable has passed the rigorous testing procedure, HDMI Licensing issues a Premium Certified Cable label, which includes a hologram and 2D barcode, so you can trust that the cable will deliver the highest level of HDMI performance.