The Arri 571727 is a 6 pack of cable crossovers in blue. Each section is 5.5" wide by 31" long. The Arri Cable Crossover has a single channel on its underside that is wide enough to cover one heavy duty cable such as a head-to-ballast cable, or 2 medium duty extension cords. Its ends have puzzle-piece style cut-outs, to allow sure connection of more than one crossover. It is constructed of heavy duty synthetic rubber, and measures 31" long, 5.5" wide.