... size: 100mm-800mm 2.material: PE100 3.water , sewage pipe double wall corrugated pipe for sewage material: PE 100 or pe80 advantage: with ... its unique wall structure desigh, such pipe has advantage of strong ring stiffness, light wieht, ... pipes and other material pipes.specifications are as blew(nominal inner diameter):200mm,225mm,300mm,400mm,500mm,600mm,700mm,and 800mm ...