The end caps are 6061 aluminum. The packing is ceramic fiber and cloth. The carbon is made with special high temp resins.
Most cars have little aluminum panels which block access to the nuts backing the windshield bolts.
These are faced with a 3M adhesive foam which , when stuck on the backside of the mounting holes enables you to remove the bolts with only an external allen key. Rivet the panels back on. Place the windscreen brackets over the studs and refasten the nuts. Now, bend the screen around the cowl and fasten with a windshield bolt, using the neoprene washer as a cushion. The flexible windscreen material, unlike acrylic, doesn't need to be heat formed, and returns to its flat state when unfastened.