FLX truck bodies are built out of lightweight corrosion resistant aluminum with steel below the floor for added strength. Standard items include full tread plate rear step bumpers, 12" centered steel floor sills, 3/4" exterior grade floors with polyurethane top coating. They're undercoated to help resist deterioration. Also included are mud flaps, interior dome lights, and durable all aluminum corner extrusions for added strength. read full review »