1. The inclined design makes it easy to open the flap when exhausting, and is easy to close due to gravity when not exhausting 2. Blue silicone sealing ring, good sealing, no air leakage 3. Large exhaust holes for quick ventilation 4. The light fan can be easily blown open without affecting the mist exhaust 5. Function: prevent backflow of smoke, prevent peculiar smell, prevent mosquitoes 6. Material: ABS 7. Applicable size: ventilation diameter is about 10-14cm 8. Inner pipe diameter: 8/10/12cm 9. Size: about 16.5 x 6cm
