🚀 Elevate Your Airflow Game! Robust plastic construction ensures longevity. Gravity flaps prevent unpleasant backflow. Meets Part F Building Regulations for safety. Ideal for kitchens, bathrooms, and HVAC systems. Push-fit design for quick setup. Non-return Shutter 150mm Diameter Easy Installation The Fantronix 150 mm Diameter External Plastic Gravity Flaps are designed for efficient air management in various settings. With a sleek black finish and a user-friendly push-fit installation, these gravity shutters prevent unwanted odors and noise while complying with building regulations. Perfect for enhancing ventilation in kitchens, bathrooms, and HVAC systems.