The Cantex 1 in x 20 ft Schedule 40 PVC Conduit (A52BA42, Millennium part 524100) is rated to 90 C for conductors and is UL651/NEMA TC-2 compliant, ETL listed nonmetallic conduit for underground and above-grade fiber and power runs. Its corrosion resistance holds up in wet vaults and buried duct banks where metal conduit would degrade faster. Standard 20 ft lengths join with common Schedule 40 couplings and sweeps for full duct runs. Millennium stocks larger trade sizes of the same Cantex Schedule 40 line for mixed-diameter duct banks.