Black Box Rackmount Fiber Shelf, 1U, 3-Adapter PanelWith this shelf, you can organize and protect fiber connections and splice trays in your 19" or 23" rackmount fiber applications. This shelf is particularly useful in cabinets and racks where little space is available. It accepts three snap in Adapter Panels or MPO Cassettes for connections. The cable punchouts are aligned for easy stacking of shelves. Plus, fiber Kevlar clamps on the outside rear hold the fiber in place as it enters the box. The