The Horizontal Hermetic Fiber Optic Splicing Closure is a complete set of accessories used for connectin permanently two (or more) fiber optic cables. A closure is installed in a horizontal position. Air-tight closure is fulfilled by a rubber sealing washer, which protects the fibre-optic fusion splices against the influence of adverse working conditions. It may be placed in the air, underground or on walls. It is a perfect solution for works in telecommunication manholes, data communication containers and in the ground.