This is a quick print to cap the aluminum extrusion of the ARB Roof Top awning. While this cap may keep some moisture in the rail, it should prevent gouging in the crap out of your hand on the sharp corners, which happened to me the when i was installing it on the rig. Just print and use a small hammer to tap them into place. Both ends are identical, so print two.
no brim or supports required.
Any layer height.
Edit: July 28, 2018, Fusion 360 file included.