Mould process, rot molding, 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.