FOSC 450 Dome Closure, 144ct Single/288ct Ribbon, 6 Ports, Includes (1) 24ct Tray, B6 Size Basket, 24.02" x 11" Fiber Optic Splice Closures or Enclosures are used to hold and seal splices. Splice closures can be used in Aerial, underground or direct burried, pole/wall mount and pedestal or ground level applications. There are different types of closures such dome style, aerial terminal closures, runt closures, gator closures and many more.