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 LC connector on one end and a Dual SC connector on the other 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