Defender 4000 Replacement Filter for Filter Queen Defender 4000 7500 360 Air Purifier, 4 IN 1, 2 Pack H13 True HEPA with 6 Pack Carbon Pre-filter

["COMPATIBILITY: Defender 4000 Replacement Filter Compatible with Filter Queen Defender 4000 7500 360 Air Cleaner Purifier.","Package includes: 2 Set Defender 4000 H13 True Hepa Filter. (2 Pack H13 True HEPA Filter and 6 Pack Activated Carbon Pre-Filter)","360° Four-in-One Filter System: Newly upgraded, the H13 True HEPA filter works together with the pre-filter, high-efficiency activated carbon filter and mesh filter.","Storage and recommendations: The filters should be stored in a dry place. For optimal performance, it is recommended to replace the filters every 6-12 months and the activated carbon filter every 3-6 months.","Satisfactory service: If you have any questions about Air Purifier Replacement Filter, please feel free to contact us, our after-sales team will provide every customer with satisfactory service."]