1. Aluminum profile manufacturers -- large and medium-sized aluminum profile factories, raw materials, production process specification, strict quality management, processing fees are much higher than small manufacturers, processing fees can be 2000-3000/ ton apart. In recent years, with the level of the industry, the aluminum industry is becoming more and more popular. Market sales also show diversification, price gap. Unidentified customers can only select industrial aluminum marketing companies from the lowest price. This drives some persistent quality-first enterprises from lower raw materials and production costs to ensure market sales, and sales market disruptions are increasingly evident.

        2 kinds of chemical composition, mixed with a lot of waste aluminum, aluminum alloy profile can greatly reduce the cost, but will cause industrial production of aluminum chemical composition is not up to standard, more serious serious harm to safety engineering professional.

        3. The thickness of the basic same specifications throughout the engineering drawings, and its cross-sectional specifications, total width, center hole, but the difference in wall thickness is very large, but also can be very different net weight, each price is quite a big difference.