Duplex MT-RJ Fiber Adapter, Blue Module, TIA/EIA-604 FOCIS-12 compliant adapter, Exceed TIA/EIA-568-B.3 requirements, Compatible with Mini-Com products for complete modularity, Designed for multimode MT-RJ connectors and patch cords, Mini-Com MT-RJ Duplex Adapter Modules are commonly used with Mini-Com Faceplates and Surface Mount Boxes.