The D-Cache is a dynamite-sized storage container that is completely waterproof and virtually indestructible, allowing you to store a multitude of items for ease of carry and secure protection. It is identical in size to an actual stick of dynamite, providing ample storage for any number of items. Manufactured from aircraft grade aluminum, all parts are bead blasted to a uniform matte finish and then red anodized for that great "explosive" look. But the best feature of the D-Cache is that it utilizes a dual-ended cap design which adds a variety of additional functions across a selection of D-Cache models. The double-ended cap design allow for easy removal of items by unscrewing either end or by removing both caps and pushing the contents through. But the greatest feature is built into the individual caps themselves! The top cap is standard across all models and includes a removable plastic "fuse", allowing you to exchange fuses of different colors to identify contents when using multiple caches. Each D-Cache includes one unique bottom cap, depending upon the model you choose. These interchangeable caps are available in a variety of functional and practical designs which include: Oil filled button compass Glass breaker/scribe Recessed magnet to allow storage onto ferrous metal surfaces 1/4-20 stainless steel threaded insert (for accessory attachment) Green or Aqua colored Embrite™ glow insert for the ultimate glow-in-the-dark marker Refer to the "End Caps" tab for additional information. If you don’t need the fuse cap and want even more functionality, you can build your own D-Cache by checking out the individual parts section of the D-Cache collection. There you can select just the tube and the exact end caps that suit your needs. Not sure what to store in your D-Cache? Check out the photos as well as the "Examples" tab for some great ideas! D-Cache Features: Manufactured from aircraft grade 6061-T6 aluminum with a red anodized finish Large capacity Watertight o-ring seals on each threaded cap Double-ended cap design Sure-grip, fluted end caps with o-ring seals Top cap includes a removable "fuse" feature, allowing you to exchange fuses of different colors to identify contents when using multiple caches Multiple end cap designs What you get: (1) D-Cache storage container including: (1) Fuse style top end cap with silver colored plastic "fuse" (1) Bottom end cap of your choice (based on model selection)