17 Structural foam-filled plastic honeycomb sheets for use in the manufacture of vehicles, marine vessels, watercraft, trailers, and trains; Plastic structural honeycomb sheets for use in the manufacture of vehicles, marine vessels, watercraft, trailers, and trains; Plastic honeycomb panels for use in the manufacture of vehicles, marine vessels, watercraft, trailers, and trains; Foam composite panels for use in the manufacture of vehicles, marine vessels, watercraft, trailers, and trains; Polymeric structural foam sheets for use in the manufacture of vehicles, marine vessels, watercraft, trailers, and trains