The TPHD 9 Inch X 9 Inch 45 Degree Exhaust Elbow is a reliable and practical solution for your exhaust system needs. With a 4-inch outside diameter, this elbow ensures efficient airflow and optimal performance. Its sturdy construction guarantees durability and long-lasting use. Designed to fit seamlessly into your system, this exhaust elbow offers easy installation and a secure fit. Improve the functionality of your exhaust system with this high-quality elbow, providing a smooth and efficient path for exhaust gases.