Corrugated profile of inside and outside provide greatest flexibility for installation of this sub-duct, while maintian good compression strength and light weight. Bina Plastic's HDPE corrugated sub-ducts are supplied with pre-installed polyester string to assist installation of fibre optic cables.
| Outside Diameter (mm) | Inside Diameter (mm) | Corrugated Wall Thickness (mm) | Standard Length (m) |
| 32 | 26 | 3.0 | 250 |
| 40 | 34 | 3.0 | 250 |
| 50 | 44 | 3.0 | 250 |
