Features: Brand new and high quality These ceiling fan air filters selected from natural odorless materials, engineered to effectively purifying the air from the home, office, and work. Our ceiling fan Filters dust collector is easy to use, just simply remove the tape backing and attach to opposite Blade of your ceiling fan. Each Filters lasts for up to three months ,and the time will depends on how much unwanted air particles in your home. When the fan Blade rotate, the pressure difference causes the filtering cotton attached to blade to traps and neutralizes harmful pollutants, including smoke, odors, and dust particles. You can widely use them on 3,4,5 blade ceiling fans as your need. Improve quality in every room with a ceiling fan without buying multiple air purifying units. Save your time and money. These Ceiling fan air filters employing thick air filtering cotton that heightens its capability to sift pollutants out and consistent adsorption of indoor air pollutants. Specifications: Material:Cotton Size:3.5x9.8inch Package Includes: 5Pcs Ceiling Fan Filters note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.