High Quality Materials: These Ceiling fan air filters are made from natural, odorless, and pollution-free materials, engineered to effectively purify the air you breathe from the home, office, and work. Easy Installation: Our ceiling fan filter dust collector are easy to use, just simply remove the tape backing and attach to opposite blades of your ceiling fan. Each filter lasts for up to three months , and the time depend on how much unwanted air particles are in your home. Working Principle: When the fan blades rotate, the pressure difference causes the filtering cotton attached to the blades to traps and neutralizes harmful pollutants, including pollen, pet dander, smoke, odors, and dust particles. Widely Use: you can widely use them on 3, 4, 5 blade ceiling fans as your need. Improve air quality in every room with a ceiling fan without buying multiple air purifying units. Save your time and money. Effectively Clean the Air: These Ceiling fan air filters Employing high-fiber, high-density, multi-layered thick air-filtering cotton that heightens its capability to sift pollutants out and consistent long term adsorption of indoor air pollutants. size: 25 x 9cm Material: non-woven fabric colour: Black Package Contents: 5 x Ceiling Fan Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.