Advantages of Rotational 1, Economic tooling costs. One-piece construction, 2,Weight reduction-as compared to most metals 3. Unifotm wall thickness---nothinning in the extremites. 4, Thickness can be varied if required. Variety of finishes and color. 5.The ability to produce multi-wall moldings. 6,Design flexibility---from small and intricate to large and complex 7,Metal inserts as integral parts. 8,Short lead-time. Resistance to stress-cracking and corrosion