OS2 SC to SC Fiber Patch Cable | Duplex 9/125 Singlemode Jumpers with Corning Optical Fiber Cores. Assembly is terminated with 2.5mm ceramic ferrule SC patch cable connectors (with sc duplex clips). Yellow, zip-cord reinforced, fiber optical jumper with 3.0 mm outer diameter, OFNR Riser Rated, flame retardant, UV resistant, PVC jacket.