Customer requirements: Waterproof, rainproof, heat-insulating and durable The 6061-T6 profile features a nano-spraying process on its outer surface, which is corrosion-resistant and durable Three-layer Low-E insulating glass blocks 95% of ultraviolet rays, reduces indoor temperature fluctuations by 10-12℃, and has a good sound insulation effect, creating a quiet office environment The unique invisible stepped stratified diversion structure features fast drainage speed, no water accumulation, no backflow, and no leakage during heavy rain Product :115 aluminum alloy casement window