Feature: 1. For aerial, buried, wall and pipe wall people use wells 2. Ring using a special material that can be repeatedly opened, re-use 3. Splice tray easy to use page design 4. A quick way to make use of open sealed maintenance easier 5. Valve and grounding devices can be installed 6. Advanced internal structure design 7. Easy to re-enter, it never requires re-entry tool it Scope: This Installation Manual suits for the Fiber Optic Splice Closure (Hereafter abbreviated as FOSC), as the guidance of proper installation. The Scope of application is : aerial, underground, pipeline, handhole.The ambient temperature ranges from -40 to 65℃. Remark: Accessories for customers' selection: earthing deriving device, pressure testing valve, buffer tube for ribbon or bunchy fiber, internal metal stainless steel,etc.