Plenum (OFNP) indicates the jacket is coated with flame-retardant, low smoke materials. Commonly used in schools and government facilities. Orange Multimode Duplex Corning optical fiber with ceramic LC connectors. Zipcord Duplex fiber is Plenum and is 62.5/125. The fiber is 2.0 mil thick. All connectors come with clips. Each cable is invidually bagged. Please note: these are custom built and make take 1-2 days to ship.