The square tube seat is made of zinc alloy. There are many surface treatments that can be done on zinc alloy die castings. The main function is to add a little different color to the surface of the die castings and make the die castings more smooth, beautiful and exquisite. Zinc alloy die castings can be used for electroplating, baking paint, electrophoresis, oil spraying, powder spraying, paint spraying, plastic spraying and passivation, etc. Each has a different effect, and will have a different feeling. If you want a strong metal texture Can choose to do electroplating surface treatment.