Check the listing for details. Bathroom ceiling Ventilation Backdraft air Damper AirScape Made in Korea White. Color: White, Condition: New. Listed at 75.00 USD. Product OverviewProduct name : Bathroom ceiling Ventilation Back Draft Damper Brand name : AirScape Manufacturer : PETRICHOR SWAN.CO., LTDOrigin : South Korea Color :White SpecificationProduct Size : 217(W) x 217(L) x 38(H) mmPackage Size : 240(W) x 225(L) x 45(H) mmNet weight : 430gGross weight : 570gProduct includes : 1 cover + 1 body + 1 bracket + 4 packs of ball type deodorant(Red clay ball) Features AirScape damper prevents backdraft air through bathroom ventilators.It's for apartment bathrooms which are connected neighbor's bathrooms. It helps to block the bad smell(cigarette) and sounds from neighbor's bathrooms.Red clay ball deodorant is made from natural material. It gives deodorization and dehumidification. It has the certified test report that it deodorizes formaldehyde, Trimetallamine, ammonia, hydrogen sulfide.Easy installation, No needs electricity. Caution Before order this item, please check your bathroom ventilator!1) Ventilator should be in normal condition. If it's too old or bad quality ventilator, AirScape may not work properly.2) Ventilator size should be less than 198 x 198 mm.3) The bathroom ceiling should be plastic and flat.4) Before installation, the attachment site should be clean and dried.