Comprehensive's Plenum Pro AV/IT 18G 4K Active HDMI Cables were designed specifically for commercial and residential system integrators as well as technology professionals in education, corporate, government, houses of worship and other demanding commercial environments. 25ft, 35ft and 50ft lengths utilize advanced active chip technology to deliver a full 4K 18G signal with 4:4:4 Color Space signal. Cables are active and directional.