Smoothwall HDPE conduit/innerduct intended for underground, aerial and innerduct applications. Manufactured from high-density polyethylene, Schedule 40 Smoothwall provides a smooth inner and outer wall finish (optionally ribbed inside), sequential footage marking, and options for pre-installed pull tape and silicone pre-lube. Meets common industry standards (ASTM F2160, NEMA TC-7, UL 651A/UL 651 etc. as listed by distributors). Offered in continuous lengths on reels (including 1,000 ft reel put-ups referenced in manufacturer PDF snippet) and available in multiple colors (black, orange, etc.).