Blue Pure 311i Max Replacement Filter - 2 Pack, High-Efficiency Air Purifier Filter for Blue Pure 311i Max

3-in-1 High-Efficiency Filtration: Combines pre-filter, carbon filter, and HEPA filter for comprehensive air purification. High-Quality Material: Made with non-woven activated carbon to capture 99.99% of airborne particles as small as 0.03 micrometers. Easy Installation: Simply remove the packaging to replace the old filter without any tools required. Perfect Compatibility: Specifically designed for Blue Pure 311i Max air purifiers, not compatible with 311i+ max or 311 Auto models. Cost-Effective Solution: Includes 2 replacement filters in one package, offering long-term value and convenience.