OS2 LC LC Single Mode Fiber Patch Cable | Simplex 9/125 LC to LC Singlemode Jumper Cord. Manufactured with the highest quality Corning optical fiber glass and terminated with durable 1.25mm ceramic ferrule LC fiber patch cable connectors. Industry standard yellow SM jacket with 2mm diameter, zip-cord reinforced, OFNR riser rated, PVC fiber optic jumper cord.