... Powder Coating, Fluorocarbon Coating, PVDF Painting, Break-Bridge and Heat Insulation, Film Attaching. 9) Hardware system: High quality ... SIEGWNIA. Product FeaturesAir-proof, Water-proof, Sound Insulation, Heat Insulation, Thermal Insulation, Anti-agingAluminum Profile38 Series, 50 Series, 53 ... , convenient remounted and carried. Other windows and doors aluminum up and down sliding windows with grids