What is the canister made of?
The canister is made of 100% powder coated aluminum just like the rails and the cover itself. A while back we used ABS plastic for a storage compartment on top of our cansiters, but we no longer do this. It not only added additional height to the canister, but it made the cover appear as though it was poorly constructed. Our clients seemed to be more concerned with maintaining the low profile of their truck than having an additional storage compartment.