This is a 1500ft non-terminated yellow 6-strand OFNP (Plenum-rated) indoor armored fiber patch cable. OS2 is a standard single-mode optical fiber commonly used with wavelengths 1310nm and 1550nm (size 9/125 microns), and has a maximum attenuation of 0.4dB/km. The OS2 standard is defined in ISO/IEC 24702. This plenum-rated indoor cable is perfect for precise process control, ensuring excellent tensile strength and performance that can be constructed without switching off the power. Our patch cables are 100% compliant for all of your networking needs. Our products are guaranteed by federal law to not affect or void OEM warranties.