·Material: High Density Polyethylene ·Size: 200mm to 2400mm ·Ring Stiffness: SN4, SN8 and SN12.5 ·Color: black or other colors upon request. ·Length: 6m,11.8m or other length upon request. ·Standard: BS EN13476-2:2007. BS EN13476-3:2007+Al:2009, GB/T19472-1 ·Application: municipal sewage, rainwater discharge, floodwaters drainage, irrigation, ventilation for mine and buildings, industrial waste discharge and communication protecting.