... Industrial Co., Ltd. Suppling HDPE corrugated pipe, it is double wall corrugated perforated plastic corrugated pipe, with high density ... weight, strong pressure, bending and excellent performance, 2. ease for construction and so on. 3. Elongated pores in the trough ... of HDPE corrugated pipe:1. Single-wall corrugated pipe2. double wall permeable permeable Bellows 3. Specifications of bore diameter: ...