This Joint Box Fiber Optic is suitable for all kinds of fiber optic cable through joint and bifurcation joint protection, derrick, overhead, and plumbing hanging wall hanging wall installation. Joint Box Fiber Optic of a complete set of plastic parts adopt scientific formula of synthetic high strength PC engineering plastic, through numerical control injection molding equipment, can effectively prevent the nature cold, heat, oxygen and ultraviolet radiation aging caused by the material, and has excellent mechanical strength. Joint Box Fiber Optic shell and body structure, can play a role flame-retardant, waterproof, shockproof, the drawing of cable joint, flattening, impact, bending, distorting, axial compression, such as protection, and can at + 55 °C and 40 °C – natural environment for long-term use. Joint Splice Box Fiber Optic’s body and hoop locking fixed sealing device for the base, equipped with elastomer seals between cylinder bottom, ensure its reliability and stability of the products, can provide optical fiber directly, termination, or differences in with reliable, solid, flexible protection.