The 8" Cast Iron Damper by Southwark Metal Mfg Co is engineered for optimal airflow control in HVAC systems. Constructed from high-quality cast iron, this damper offers exceptional durability and resistance to high temperatures. With an 8-inch diameter, it is designed to fit seamlessly into standard ductwork, allowing for precise regulation of air flow. The damper features a manual adjustment mechanism for easy operation, ensuring efficient performance in various applications. This product complies with industry standards, making it a reliable choice for both residential and commercial ventilation systems.