Alarm Cable, Fire Alarm Cable, Speaker Cable manufacturer / supplier in China, offering SC/SC Duplex OS2 Single Mode Fiber Optical Connector with Flange Adapter, SC/APC Duplex OS2 Single Mode Fiber Optic Connector Coupler with Flange Adapter, SC/SC Duplex OS2 Single Mode Fiber Optic Connector Coupler with Flange Adapter and so on.