Based on this product's specifications, here are some alternatives and similar models
Ventilation grille AWENTA MTK2BR 140x140 mm brown
Summary description:
AWENTA MTK2BR is a brown 140×140 mm ventilation grille designed for residential and commercial ventilation openings. It provides a protective and decorative cover for ducts and wall vents, matching interior finishes. The grille is suitable for standard square ducts of the same dimensions and is used for air intake or exhaust, preventing debris entry while maintaining airflow.