The pipes are used in underground conduit systems and in inner conduits and they are resistant to compressions up to 250 and 450. The pipes are made of high density polyethylene (HDPE) of very particular properties. The inner surface of the pipes is smooth or longitudinally grooved, with or without a sliding layer.
The basic pipe diameters are: 25mm, 32mm, 40mm and 50mm. The pipes may be longitudinally marked with colour stripes.