The Panduit FlexCore™ Universal Patch Panel contains one 4RU enclosure and tray labeling to fit any Panduit FDFF45** 600mm frame (frame not included). These panels are installed at the back of the frame to completely, securely enclose the frame and are capable of handling twelve trays of 24 fiber for a total density of 288 fibers per 4RU enclsoure. All of the necessary installation hardware is included. It is gray in color.