Fiber optic adapter is also called optical fiber coupler. It is used to provide a cable to cable fiber connection. People sometimes also name them to be mating sleeves and hybrid adaptors. Mating sleeves means this optical fiber adapter is used to connect the same type optical fiber connectors, while hybrid adaptors are the optical fiber cable adaptor types used to connect different kinds of optical fiber connectors. Fiberinthebox provide a complete line of adapters for optical fiber connection, like ST, SC, FC, LC, MTRJ, MPO and MU style optical fiber adapters for both multimode and single-mode fiber applications. We also can offer fiber adapter plates for ST-, SC-, MT-RJ- or LC-type connections.