ST-ST-6M MM duplex*62.5um dia:2.8mm,fiber patchcord,fiber patchcord,Optic Fiber Patch Cords,Connector,Attenuator,Adapter ST-ST-6M MM duplex*62.5um dia:2.8mmfiber patchcord,fiber patchcord,Optic Fiber Patch Cords,Connector,Attenuator,Adapter,Patch Panel