A fiber optic adapter or coupler is a special passive component designed to mate or connect two ends of a fiber optic cable with high precision. Fiber optic adapters mate two ends of different fibers optic connectors, achieving the conversion between different connectors FC, SC, ST,LC, MTRJ, MPO, E2000 and so on. They are widely used for Optical Distribution Frame (ODF),fiber optic communication device and equipment, with excellent performance, good stability. We can also call them Fiber optic Flange or Coupler. 

Name	SC OM4 DX Metal Adapter
Type of Connector	SC
Standard	IEC/SGS/ROHS
Color	Violet
Fiber Mode	MM
Sleeve	Caremic/Phosphor Bronze
Green production	Yes