Selling My ROAM adventure case. It's the 83L it's in great shape!  I did put 4 holes in the bottom to mount to my roof rack.  

From the web:
The ROAM 83L Rugged Case is a heavy-duty storage case and is ideal for storing your long items such as chairs, shovels, axles, recovery gear or just adding more storage to any vehicle. Rugged low-profile storage that seamlessly mounts the roof of any vehicle. This premium case features a durable LLDPE shell, our proprietary Lid-Lift mechanisms, steel lockable latches, and a dust/water resistant gasket seal that makes sure your gear always stays protected no matter the weather or terrain. The threaded inserts in the lid give you the ability to add a lid organizer or molle panel to take your organization to the next level. Having an interlocking design makes stacking and pairing simple no matter the amount of gear you carry.