PATIKIL 3 Inch 4 Inch 5 Inch Backdraft Damper, 1 Set ABS Flexible Airflow Inline Backflow Duct Adaptor Draft Blocker for Bathroom Exhaust Fan

• Outer Diameter of Interface: 80mm 100mm 120mm / 3 inch 4 inch 5 inch; Overall Size: 160 x 160 mm / 6.3 x 6.3 inch (L*W)
• Advantage: 1. Made of durable ABS plastic, which has waterproof and high hardness, not easy to scratch, oil resistant, high temperature resistant, moisture-proof and easy to clean, can be used for a long time;2. When the exhaust starts, the air pressure will push to open the valve for air discharging; after the exhaust stops, the damper valve will automatically close and remain closed all the time to prevent odor from entering your room, making your indoor environment full of fresh air
• Instruction: 1. You can apply sealing glue around the bottom of the backdraft damper and fix it with screws to the vent hole on the wall;2. Finally install the vent hose(not included) to the damper and seal with tape if necessary.
• Application: The backdraft damper is used to prevent the backflow of lampblack or exhaust gas through air duct when the ventilation fan is off, it also prevents debris, dust and odor from entering your room. Widely used in dryers, extractors or range hoods, and other HVAC applications. You can install it in your home, kitchen, bathroom, office or living room which needs a ventilation system.
• Note: Please confirm the outer diameter of the backdraft damper before placing an order.

The backdraft damper is used to prevent the backflow of lampblack or exhaust gas through air duct when the ventilation fan is off, it also prevents debris, dust and odor from entering your room. Widely used in dryers, extractors or range hoods, and other HVAC applications. You can install it in your home, kitchen, bathroom, office or living room which needs a ventilation system. Specification Color: White, Yellow Material: Plastic, Metal, Aluminum Foil Outer Diameter of Interface: 80mm 100mm 120mm / 3 inch 4 inch 5 inch Overall Size: 160 x 160 mm / 6.3 x 6.3 inch (L*W) Packing List: 1 Set - 1 x Backdraft Damper with Glue*1, Screw*4, Aluminum Foil Tape*1 Advantage 1. Made of durable ABS plastic, which has waterproof and high hardness, not easy to scratch, oil resistant, high temperature resistant, moisture-proof and easy to clean, can be used for a long time; 2. When the exhaust starts, the air pressure will push to open the valve for air discharging; after the exhaust stops, the damper valve will automatically close and remain closed all the time to prevent odor from entering your room, making your indoor environment full of fresh air. Instruction 1. You can apply sealing glue around the bottom of the backdraft damper and fix it with screws to the vent hole on the wall; 2. Finally install the vent hose(not included) to the damper and seal with tape if necessary. NOTE: Please confirm the outer diameter of the backdraft damper before placing an order.