Mould process, rotomolding , rotational molding, vacuum molding, gyre molding Advantages of Rotational 1, Economic tooling costs. One-piece construction, 2,Weight reduction-as compared to most metals 3. wall thickness---no thinning in the extremists. 4, Thickness can be varied if required. Variety of finishes and color. 5.The ability 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