MR398-JB series fiber-optic junction boxes are designed to join two fiber-optic cables, and environmentally protect the connection. The product provides a turnkey solution for installing optical interconnect "hard points" in harsh-environment cabling applications. The junction boxes are designed to seal the incoming cables, while accommodating varying diameters of optical cable. Standard models include LC Duplex to LC Duplex, LC Duplex to ODVA LC, and ODVA LC to ODVA LC.