Corning UCAO closures accommodate fiber optic cables and provide excellent environmental protection for up to 60 single-fiber splices. The lightweight, watertight design of these compact closures features a hinged case with a lid secured with flip-locking clips for ease of access and re-entry. Each UCAO comes equipped with reusable seals that require only cleaning and lubrication. The UCAO closure is suitable for aerial, underground or direct-buried applications. Four in-line ports allow up to a total of 28 mm cable diameters. A modular splice tray stacker holds up to five splice trays. No special tools are required for closure assembly and re-entry.