DN1000-DN1200 HDPE Steel Strip Corrugated Pipe from Chinese Factory fits culvert strongly. Crafted from high-quality HDPE and thick steel, it’s corrosion-resistant and impact-proof. Corrugated Steel Reinforced HDPE Pipe applies to railway and highway culvert works. SN12.5 grade and 9m length meet global construction standards, widely adopted.br For more details, contact us: br ➡️ WhatsApp: +85267433414br ➡️ Email: samwang601@gmail.