Square ventilation grille - with non-return valve - for exhaust fan outlet - for 150 mm duct

Robust Construction: These louvered wall vents are made of high-quality plastic and feature countersunk screw holes. Features: The vent cover flap closes automatically when not in use, protecting your home from odors, noise, and drafts. Applications: This exterior vent cover is designed to meet your renovation needs. It is ideal for passive ventilation, air conditioning, heating, ventilation, and heat recovery. Installation: This exterior vent can be inserted into a ventilation duct or flexible duct and then secured to the wall using the included screws.