Compatible wtih Blue Pure Mini Max: This mini max replacement filter compatible exclusively with Mini Max Air Purifier, ❌NOT compatible with 211+ and 211+ Auto 211i max,411imax, 511 and other models. Please check your machine before purchase MERV 13 Filter : MERV 13 rated filter captures airborne particles such as tiny particles, smoke, fibers, improving air quality in your home or office Value 4-Pack: Package includes 4 Pack mini max Air Filter, Allowing for easy replacements and ensuring you always have a filter ready to maintain indoor air quality Warm Tips: We recommend you to replace your mini max filter filter every 6-8 month for optimal performance, Depending on your usage and environment Customer Support: We are committed to providing exceptional customer service. If you have any questions.For any product inquiries, please reach out to us - we typically respond within 24 hours to assist you 4 Pack Mini Max Replacement Filter Compatible with Blue Pure Mini Max Air Purifiers, FMINI Filter Fits for Blue Pure Mini Max, H13 HEPA and Activated Carbon Filter