Our DuraOpto ducts are made from our own high-quality recycled High Density Polyethylene (HDPE) materials. Available in Smooth or Ribbed interior, and includes a lubricated inner lining providing low inner friction maximizing cable blowing distances. DuraOptos are 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. DuraOptos 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.