Attributes . Empty, Accepts up to (3) Opt-X Adapter Plates or (3) Opt-X P-N-P Modules and Accepts up to (3) Splice Trays., Stackable and Adjustable Fiber Rings Simplify Cable Organization, Front Saddles Pivot for Improved Patch Cord Routing, Removable Front and Rear Covers for Better Access to Interior of Enclosure, Made in USA . Names