Comprehensive Air Filter: every package includes 4 roll of furnace air filter air conditioning, which is suitable for capturing and removing particles or pollutants in the air, such as dust, hair, etc., keeping your space fresh and bringing you convenient Suitable Size for Vent Shapes: with dimensions of approximately 7.6 ft/ 230 cm in length, about 12 inches/ 30.48 cm in width and approximately 1.3 cm in thickness, this washable air filter can be tailored to fit virtually most vent sizes, which is the ideal solution for those seeking to upgrade their air filtration in spaces with different vent sizes Easy to Cut: these air conditioning filters are easy to cut, making it reliable to fit most sizes, and their DIY friendly nature empowers users to size and install the filter themselves, thereby saving on installation costs, suitable for using on most walls, ceilings, floor vents and more Wide Range of Usages: our air conditioning furnace vent filters are suitable for use in vents of all sizes, and its DIY nature can make them ideal for kinds of vents, grilles, covering floors, , air conditioning vents, HVAC vents, RV's and more Quality and Safe Material: the air filter roll air conditioning is crafted from quality polyester, which ensures a strong and efficient filtration process, purifying the air that flows through; In addition, it can be washed repeatedly to provide ideal filtration effects for your home, office, classroom, store, and more. size: 30 x 230cm Material: Cotton colour: blue Package Contents: 4 x Air Vent 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.