I have 3 of these if interested in more than 1.

This Ultra-Zone Forced Air Zone Motorized Round Damper is designed to regulate airflow in HVAC systems. The damper has a 16-inch diameter and is 20 inches tall, making it suitable for a variety of applications. It is made with high-quality materials and is built to last.

The damper is ideal for use in a range of settings, including commercial and industrial buildings. It is easy to install and can be used to control airflow in ducts and other HVAC components. Whether you are looking to improve the efficiency of your HVAC system or simply want to ensure that your building is comfortable, this motorized damper is a great choice.