A100 Bathroom Check Valve Exhaust Pipe Ventilation Check Valve(Expansion Screw+Aluminum Foil Tape)

1. The inclined design makes it easy to open the flap when exhausting, and is easy to close due to gravity when not exhausting2. Blue silicone sealing ring, good sealing, no air leakage3. Large exhaust holes for quick ventilation4. The light fan can be easily blown open without affecting the mist exhaust5. Function: prevent backflow of smoke, prevent peculiar smell, prevent mosquitoes6. Material: ABS7. Applicable size: ventilation diameter is about 10-14cm8. Inner pipe diameter: 8/10/12cm9. Size: about 16.5 x 6cm