Based on this product's specifications, here are some alternatives and similar models
Airflow choke with knob for hot air distribution Comfee DGP125PJS2
Summary description:
Airflow choke with a knob designed for hot air distribution by Comfee, model DGP125PJS2. This mechanical damper controls and adjusts airflow in heating or ventilation ducts, allowing manual regulation of hot air delivery. Suitable for use in residential or light-commercial HVAC systems where simple, reliable modulation of air volume is required.