Opt-X® Ultra® Fiber rack mount enclosure. Constructed of 16-gauge steel, powder-coated black. Plastic parts made using self-extinguishing ABS and polycarbonate materials rated UL 94 V-2. Grommet material made of Santoprene® a thermoplastic rubber elastomer. Empty, 4RU configuration. Accepts up to 12 adapter plates and splice trays or 12 MTP modules. Sliding tray removes completely from enclosure to facilitate field terminations and splicing. Sliding tray glides forward and backward, providing accessibility to front and rear bulkhead after installation. 17 inch depth for high-density fiber termination and/or splicing. Removable, transparent hinged doors and slide-away covers allow easy access during install and visibility of interior after install. Patch cord bend-radius guides minimize macro bending. Stackable and adjustable fiber rings simplify cable routing and organization. Saddles pivot for improved patch cord routing and organization. Removable rubber grommets protect cable and minimize dust build-up. Compatible with Intact™ Intelligent Port Management System. Used in high-density fiber applications such as data centres, equipment rooms, central offices, etc.