Features Small size, large capacity Bayonet structure, convenient for installation. High return loss, Low insertion loss Push-and-pull structure, convenient for operation; Split zirconia (ceramic) ferrule is adopted. Used to mate two connectors together. Usually mounted in a distribution panel or wall box. EFON’s FC adapter is available for all standard connector types in both single mode and multimode. The adapters are color coded allowing easy identification of the adapter type. Available with single-core & multi-core patch cords and pigtails.