The FICOC(SJOF-HTC-BS406A) is a fuzzy integral closure that makes it possible to detect water ingress inside of the closure without re-entry. It can verify the inner condition of the closure with WSM(Water Sensing Meter). Therefore it enables users to establish database on optical lines on a regular basis. The FICOC features high capacity for its sizes. It is designed to accommodate up to 144 cores. For a perfect water tightness, the closure employs dual silicon gasket and sealing socket whose structure is designed to accept any cable in every diameter and they are reusable. It can be placed in a duct, aerial, buried and inlet/terminal application.