Compatible : Compatible with the Blueair Blue Pure 411, 411 Auto, 411+ Air Purifie-r. Get back to having a clean air to breathe again! Particle Filte-rs ：PARTICLE filte-rs can clean up 99.97% of airborne particles, including pollen, dust, pet dander, common pollutants, and fabric fibers. Premium Quality: We deliver high quality, durable and long lasting replacements, allowing the filte-r to last longer, and has a collapsible design.They are an efficient investment. In order to improve the performance of the air purifie-r, please replace the carbon filte-r every 6~8 monthes. Activated Carbon: The high-grade activated carbon filte-rs can efficiently odors and fume, such as smoke, cooking smells, and pet odors. Customer Service: Package include 2 x Carbon Filte-r. If you have any problems with the filte-r fitting your air purifie-r, please contact us through our Amazon home page. Filter made of FSC-Certified paper Brand Name Cabiclean Unit Count 3 Count Manufacturer Cabiclean Model Number 411 Material Type 411 Product Grade new Item Type Name 411/411 Auto/411+ Repalcement Filter Number of Items 3 Compatible Devices 411 Common Applications Residential, Appliances Included Components 411 Air Filter Construction Pleated Compatible Air Purifier Models Blueair Blue Pure 411, Blueair Blue Pure 411 Auto Item Dimensions L x W x Thickness 11.4 L x 11 W x 5 Th