Awenta 4'' Inch / 100 mm Exhaust Hood Vent White ABS Plastic Non Return Valve, Backdraft Damper Dryer Opening, Extractor External Ventilation Cover Outdoor Air Cap Grille

Amazon

FITS 4” DUCTS & STANDARD OPENINGS – Designed with a Ø3.9 inch (100 mm) connection and 7.5 x 7.5 inches (190.5 x 190.5 mm) outer frame. Compatible with dryers, bathroom fans, and HVAC vents. SCREWS INCLUDED for a secure wall mount. BACKDRAFT & PROTECTION – Integrated gravity flap prevents cold air, dust, and unwanted things from entering. Keeps airflow one-way and efficient. QUICK DIY INSTALLATION – Simple to mount with pre-drilled holes. Includes screws and screw caps for a clean finish. No need for extra tools. BUILT TO LAST IN ANY WEATHER – Made from UV-resistant ABS plastic that withstands sun, rain, snow, and frost. Won’t yellow or crack over time. PERFECT FOR OUTDOOR VENTING – Ideal for home exterior dryer outlets, bathroom exhaust fans, kitchen extractor systems, or garage ventilation., Weight: 0.4 pounds, Manufacturer: Awenta

ManoMano

Ventilation systems are designed to distribute air in ventilation systems of flats, homes, and utility buildings. - Ventilation cover for round ventilation systems; - Size: 100mm; - Material: plastic.