Dura-Line Smoothwall HDPE innerduct/conduit (1 1/4" nominal, SDR 11) is a flexible HDPE conduit with smooth inner and outer walls. It is available with an optional SILICORE ULF permanently lubricated lining to enable longer cable pulls and higher-speed jetting. Smoothwall is suitable for direct burial, directional bore (HDD), plow, tray or aerial installation and is offered in multiple colors and reel/segment configurations. Continuous lengths/long reels and optional factory-installed pull tape or pre-installed cable are available.