Closure allows two cables in and two cables out. It accommodates the splicing and branching of the cable which is used in aerial-hanger, wall-mounting or direct buried. The Closure is an openable box which is made from high-quality PC, and, with the mechanical Sealing Structure fills with sealing materials. The outside structure and tighten pieces are made from stainless steel of good quality. The Closure can be opened and used again by changing the sealing materials after it be sealed (Using Silicon Gum Material for sealing, the closure can be used again also