The best way to distinguish the two materials is to look at the cross section. The clean 6063 material has high iron content and many impurities, and the section will be black or have black saw marks. A more direct way is to go to the factory to see their aluminum profiles. There must be something wrong with the low price. The blank produced by A00 aluminum ingot is much whiter than clean material and has good toughness. Clean materials are brittle and as hard as iron when they fall to the ground. The material thickness exceeds 1.2, so it can be used.