The Rheem AP13156-1 Vent Hood Damper Assembly measures 9 inches by 10 inches and is designed to enhance the ventilation of your Rheem water heater. This assembly ensures proper airflow, improving the efficiency and safety of your heating system. Made from high-quality materials, it is built to withstand the rigors of high temperatures and pressures. Its precise fit guarantees compatibility with various Rheem models, making it an essential component for maintaining optimal performance. This vent hood damper meets industry standards for safety and reliability.