DN300-DN2400 from Chinese Factory suits drainage durably. It’s made of high-quality HDPE and galvanized steel strip, with strong corrosion resistance. Steel Reinforced HDPE Corrugated Pipe fits sewage, drainage and culvert projects. Its high strength (SN8-SN16) passes ISO tests, trusted globally for long service life and easy installation.br For more details, contact us: br ➡️ WhatsApp: +85267433414br ➡️ Email: samwang601@gmail.