... bag packing then pannelSurface:Pure,Mill finished,Anodizing,Powder coatingtype:round,square and so onPackaging & ... CastingNameDie casting productMaterialAluminum alloy,Various kindsSurface TreatmentSandblasting, Tumbling, Powder coating, Painting, Chromating(chemical film) and Polishing ... imported improver, and with ultraviolet-radiation-proof absorbent, plastic doors and windows remain the same color ...