Fiber opitc closure is applied in the junction and protecting of the fiber.The outer part and the fusing part of the clousure are made by the strengthen Polymer plastic. So it have the features as below:
  Great mechnical performance 
  Great resisting aging performance
  High airproof,dampproof and resisting,lightning strike performance 
  Can be place with the aerial cabal or buried in carth put in the pipeline
  The in and out channels can be two to six