Replacement HEPA Filter by LifeSupplyUSA, Compatible with AIRMEGA Max 2 Air Purifier 400/400S 3111735. This is a high quality replacement part by LifeSupplyUSA exclusively for sale by LifeSupplyUSA. Any brand names or logos are the registered trademarks of their respective owners. This filter is absolutely essential for allergy sufferers designed to filter smoke, dust, pet dander, pollen, mold spores, fabric and other allergen airborne elements. Any use of any brand name or model designation for this product is made solely for purposes of demonstrating compatibility.