The CommScope FOSC-ACC-D-TRAY-72-KIT (Millennium part #10539, vendor #915167-000) is a 72-position splice tray accessory kit built for CommScope's FOSC 450 and 600 D-style splice closures. It gives fiber splicing crews the tray hardware needed to organize and protect up to 72 fiber optic cable splices in a single closure, supporting higher-density outside plant and feeder network builds. The kit's modular design allows for straightforward mid-span entry and organized splice management during future maintenance. As a direct-fit accessory for CommScope FOSC closures, this 72-position kit is a dependable choice for contractors scaling fiber splice capacity in the field.