Based on this product's specifications, here are some alternatives and similar models
Supply air anemostat Sourcing DN125 metal
Summary description:
Supply air anemostat Sourcing DN125 in metal construction for HVAC systems. Designed for mounting in ductwork with DN125 (125 mm) connection, it regulates and directs incoming air flow in ventilation and air-conditioning installations. Suitable for commercial and residential use where controlled air distribution, directional flow and integration into duct networks are required.