Corning Optical Fiber Optic Splice Closure 2178-XL is designed to meet all common needs and field conditions. The unique strength of the member clamp assembly avoids cable sheath movement with temperature changes. This flame-retardant closure is ideal for wall-mount, aerial strand-mount, pedestal, underground and pole-mount applications. Corning Optical Fiber Optic Splice Closure 2178-XL comes with larger and smaller interchangeable closure halves. The highly chemical-resistant material allows you to use it in buried, underground and aerial applications. This gasket sealing closure is easy to install, easy to use and easy to re-enter. It provides a separate area for routing, protecting and expressing buffer tubes and ribbon fibers.