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 9m core and 125m cladding diameter. Color-coded Dual LC 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.