The ABS plastic banana wraps are used on newer Airstreams, but they fit vintage Airstreams (including Argosys) starting in 1969. They are a dark charcoal color and should be painted. You should expect to trim them to fit your application. Generally, hold them up to the curve, trim a little, fit again, trim a little, and so on until you get the fit you desire. These were originally installed with 1/8" Pop Rivets
Please note that all four versions have a flat area on them designed for mounting a reflector (VTS-376 or VTS-147).
Additional note about finish: Beginning in June 2016, Airstream is transitioning to using a textured plastic rather than the smooth. The smooth is no longer available. If you order more than one section, you may receive some textured and some smooth. Before painting, sand the texture to reduce its visibility.