This is a set of 6 speaker cables (cords) that were used for a 5.1ch surround system. They can also be used as cords to connect audio equipment and speakers, even if not for a 5.1ch surround system. I have confirmed that they conduct electricity. - Gray (for rear speakers): Approximately 8m x 2 - Red (for front speakers): Approximately 4m x 2 - Blue (for center speaker): Approximately 4m x 1 - Green (for subwoofer): Approximately 4m x 1 - Thickness: Approximately 2mm x 2 = Approximately 4mm The lengths are all slightly shorter than stated. The gray cables have some yellowing, but please consider purchasing only if you understand this condition. Packaging may be made from recycled materials, so please be aware of this. Thank you for looking.