What is the color design of common aluminum box trolleys?

Although there are many styles of aluminum box pull rods, it is also designed to match different aluminum boxes, which can bring more convenience to users and improve work efficiency. The pipe material of the aluminum box rod can be not only aluminum tube, but also iron tube, and whether it is iron or aluminum tube, the surface of the aluminum box rod must be processed. For the current style, look at the aluminum tube rod tube. The color is either silver or black, and the surface treatment of the pipe not only achieves the effect of changing the color, but also has a good anti-corrosion, anti-oxidation, and anti-rust effect.