Based on this product's specifications, here are some alternatives and similar models
DARCO ZAS D125 Damper for Hot Air Distribution Systems
Summary description:
The DARCO ZAS D125 damper is a specialized component designed for hot air distribution systems. It allows for precise regulation of airflow within ventilation or heating ducts. Constructed for durability and efficient performance, this valve ensures optimal control in residential or commercial air distribution setups, facilitating effective heat management and system balance.