... A: Yes, free sample is available Q3. What raw material do you use? A: stainless steel, carbon steel, mild steel, galvanized ... /chrome plating, painting, anodized,hot dip galvanized, sandblasted, etc. Q5. How do you ensure quality control? A: First of all, Our company is ... sample test, last sample test, Random test, etc. Q6. How do you ship the goods? A: We have our cooperation forwarder, they ...