... :LLDPE,Rotational mould2. Post(Guardrail, handrail etc):Galvanized or steel,(Or aluminum, galvanization as per request)3. Deck,Stairs,Bridges ... size and shape and material composition3. Check the machining precision4. Check if any leakage5. Check the surface smoothness6. Check the quality of the plating, ... finished goods10. Follow the step 6,7,8,911. Check the logo, Size and item no. of the carton.