The Graphite Modular 5x4 15U Fastener Insert Bundle is a practical shortcut for customers who want a fuller internal layout straight away. It combines one 6U insert pack and one 9U insert pack to suit the internal capacity of the 15U box, giving you a quicker route to organised storage for fastener-style use cases. For launch pricing, this bundle also gives an initial saving of £0.99 versus buying the included insert packs separately.