UPVC round tube 1.Material:UPVC profile with steel reinforcement. 2.Colors: White, brown, gray, yellow, green and so on 3.Top quality wit high strength corrosion resistance, anti-aging performance, sound and heat in solution, strong wind resistance and fine tightness 4.Beautiful and elegant appearance with the easy-to-operate, easy-to-clean 5.The product has passed the inspection for new scientific and technical tests and is considered to have reached the advanced international standards