... stress, service life of up to 20 years.8) Surface treatment: Anode Anodizing, Electrophoresis Coating, Powder Coating, Fluorocarbon Coating, PVDF Painting ... & Service1) Can be used for new construction, remodeling or complete window replacement. Such as bedroom, kitchen room, bathroom, passageway, stair, roof ... and carried. Other windows and doors aluminum alloy black shutter window