JISIZKY Replacement Air Filter 311i Max Compatible With Blueair Blue Pure 311i MAX F3MAX AIR Purifier,H13 True HEPA Activated Carbon Filter(2-Pack)

["►JISIZKY Premium Quality Replacement Air Purifier for Blueair Blue Pure 311i MAX F3MAX is highly effective in cleaning particles as small as 0.003 microns, like dust,common pollutants.","►Compatible with Blueair Blue Pure 311i MAX F3MAX AIR Purifier,H13 True HEPA Activated Carbon Filter(2-Pack).","►This replacement Air Purifier 311i MAX F3MAX can run around 6 months.For better performance, please replace the air filter regularly according to your use frequency and environment.(about every 3 to 6 months to replace)."]