DB-120 utility duct has 4-Inch trade size and 0.154-Inch wall. It has an outside diameter of 4.5-inches. This impact-resistant duct with belled end connection, has PVC construction for durability. This duct withstands a temperature of 90 deg C. It is suitable for commercial, industrial and utility applications. The duct meets ETL, ASTM F 512 and NEMA TC 6 & 8 standards.