Product Name: Fiber Optic AdaptersModel Number: FFC11, FFC22, FFC55Place of Origin: ChinaFeatures: 1) Used to connect Multi-mode and Single mode ST, SC and FC cables 2) Compartmentalized carrying case keeps all your couplers in one place for easy access 3) Dust caps protect against debris and contamination 4) Telecom networks 5) CATV networks 6) Data communication networks