Kramer's 4LC fiber optic cables are constructed of 4 individual color coded multimode 50/25um simplex cables of diameter 2.0mm each, contained in a round overall orange jacket. They are intended primarily as companion to various Kramerdetachable transmitter/receiver sets. Quality Construction - Sub-cables are color coded: red, green, blue and orange and are terminated with the popular LC connectors for easy installation and are shipped with dust caps at the ends. Numerous Applications - Use these cables to connect Kramer optical transmitter and receivers for DVI and HDMI, such as: 610 T/R, 621 T/R and 631 T/R.