Fiber Optic Splice Closure is also called gun barrel. The fiber optic splice closure mainly refers to the optical, sealing and mechanical strength provided by the adjacent two optical cables. Continuous connection ensures the continuous protection device. It belongs to the system through the mechanical pressure sealing joint but the optical fiber connector. The box is mainly applicable to the straight-through and branch connection of the laying method between overhead cables, pipes, buried burial cables and the like of various structural optical cables. The waterproof and elastic conjoined sealing technology used in fiber optic splice closures is a patented invention. After hundreds of trials, this technology was finally invented. This technology uses imported elastic rubber sealing material, which is of very good quality and is molded in the mold at one time, so that the surface of the product will not have joints and ensure the sealing performance. Many times there are no cracks and they can be reused to solve the difficulties encountered during construction. The fiber optic splice closure import and export that has a lot of space will not only satisfy the current number of fiber optic cables, but also prepare for future expansion. It will serve two purposes and take precautions. Fiber optic splice closure is very convenient to dismantle, can maintain the product's tightness in severe temperature changes, the performance is very good, can be used in a variety of ambient temperatures, widely used in communications networks across the country. The fiber optical is compact in structure, spacious in space, and has very good chemical and electrical resistance properties. Splice trays are stacked, flexible and easy to install, and the degree of fiber bending reaches international standards. The fixed base inside the fiber optic splice closure is made of imported engineering plastics, has high strength, is cast in the mold, has high voltage resistance and high insulation resistance, and fully meets international standards.