Our DuraOpto ducts are made from top quality virgin High Density Polyethylene (HDPE) materials. Available in either smooth or ribbed inner surface with optional lubricated inner lining that provides low inner friction maximizing cable blowing distances. DuraOpto is offered in two variations, one designed for creating a new direct buried pathway, the other specifically for placing as a subduct in an existing line. DuraOpto DB (Direct Buried) can withstand impact and are suitable to be directly buried. DuraOpto DI (Direct Install) is designed to be installed by pulling, blowing or pushing in existing duct systems.