(1) Aluminum grade: According to the different metal content, aluminum alloys can be divided into various grades. The commonly used system window is 6063-T5, which has good ductility and can pull out aluminum materials of various structures, making it very suitable for complex system windows. However, 6063-T6 has high strength and is suitable for use in sunny rooms with a variety of curtain wall profiles, making it suitable for areas with a single structure.

(2) Paint surface: The most popular aluminum paint surface is metal paint, especially fluorocarbon paint, which has good resistance to UV corrosion. However, the paint surface also varies from brand to brand, resulting in a different texture.

(3) Wall thickness: According to the new national standard, the thickness of aluminum material must reach 1.8mm. If it exceeds 4 square meters of large glass, it is recommended to meet the new national standard. Generally, for small glass or those with low floors, 1.6 is also sufficient.

(4) High precision, ordinary level: aluminum rod currency machine, drawn into door and window profiles. There are also significant differences in production equipment, as good equipment pulls out profiles with a flat structure and uniform thickness.