Features: 1.10 pieces of cut 11.8"*27.6" purifying cotton and a roll of double-sided tape that can be directly attached. To capture dust particles, all filters create some degree of wind resistance, which restricts airflow. 2. We have specially selected a filter cotton with static electricity, which can reduce air resistance and allow as much air to flow through as possible, while still capturing a large number of dirt particles, reducing the workload of the filter, reducing filter pollution, extending filter life. Of course, you can also use cotton filters in your vents, which can effectively reduce indoor dust, improve indoor air quality, and reduce the frequency of your cleaning. 3. Removes airborne particles that cause unwanted physical symptoms such as sneezing, coughing and red eyes. Makes your whole house fresher, cleaner, healthier and reduces the amount of dusting and cleaning you have to do each week, cut to fit air filter rolls. 4. Quick and easy installation. A simple cut to fit any size duct filter: Compatible with all sizes of vents, registers and grills. Covers all types of vents on floors, ceilings, walls, air conditioning vents and HVAC vents. Cut to any standard vent register size, perfect for DIY projects 5. The largest ventilation filter roll at the best value for money Premium filter material rolls are premium filter fabrics for home, RV air conditioner filters, RV AC filters, mobile homes, campers, AC vent filters and DIY projects. Specifications: Name: Air conditioner filter cotton Product size: 30*70cm Packing size: 30*15*2cm Weight: 180g Package Contents: 1* Double-sided tape 10*pcs Filter cotton Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.