Buy with Confidence: With Monoprice's Lifetime Warranty on all Cables, you can rest assured we stand behind our products and our customers."Yellow" single-mode cable with a 9 m core and 125 m cladding diameter. Color-coded Dual SC connectors on each end OFNR (Optical Fiber, Non-conductive, Riser) rated by UL, making it safe for use within the walls and between the floors of commercial class buildings. Made with Corning brand optical fibers