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. 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.