AddOn 2m LC (Male) to ST (Male) Yellow OS1 Duplex Fiber OFNR (Riser-Rated) Patch CableThis is a 2m LC (male) to ST (male) yellow duplex riser rated fiber patch cable. OS2 is a standard single mode optical fiber commonly used with wavelengths of 1310nm and 1550nm (9 125 microns), and has a maximum attenuation of 1dB km. The OS2 standard is defined in ISO IEC 11801. This optical fiber, nonconductive, riser (OFNR) cable is best suited for use in interior fiber optic applications. A duplex cable is a two strand fiber optic patch cable that