Greentel fiber optic splice closure is mainly used for the connection function of the distribution optical cable and the household line optical cable in the outdoor, and is also one of the necessary connection equipments for the optical cable length in the optical cable engineering construction, providing direct connection, switching, divergence and protection functions for the optical network, and the box body. It adopts imported reinforced plastic, high strength and corrosion resistance. The terminal box is suitable for the connection in the terminal room of the structural fiber optic cable. The structure is mature, the seal is reliable, and the construction is convenient. Widely used in communications, network systems, CATV cable TV, fiber optic cable network systems, and more. The casing of the fiber optic splice closure can be divided into a plastic outer casing and a metal outer casing. There are relatively few metal casings on the market, generally using PC plastic (resin) or ABS + PC (resin) plastic casing. It has anti-stick, waterproof, impact resistance, wear resistance, heat resistance and flame retardant properties. The sealing performance of the greentel Fiber Optic Splice Closure: the horizontal fiber optic splice closure has a large sealing area, and the sealing portion is irregular, and the sealing of the housing is sealed; relatively speaking, the cap type has a small sealing area and the sealing portion is regular (the sealing groove is circular) Sealing seals. Therefore, the cap type of the casing is easier to seal than the horizontal type. In and out of the cable mouth, the cap type adopts the thermoplastic sleeve, the sealing is good and firm; the horizontal type adopts the waterproof insulating glue, the sealing performance is good, and the firmness is not good, the heat shrinkable casing is good (reflected in the tensile performance).