Our FF50 Silver Carbon FIT50 HEPA Filter Replacement Compatible with BreatheSmart FF50 FIT50 Air Cleaner Purifier. Compared to Part HEPA-Pure FF50 silver carbon filter TRUE HEPA FILTER: High-Efficiency HEPA filter replacement filters 99.97% of dust, lint, and harmful fine particles as small as 0.3 microns. Package include: 2 x FF50 True HEPA Filter Replacement Warm Tips: It is recommended to replace it every 6-8 months (dependent on air quality and use) Disclaimer: This product is a generic item that is designed to replace the original part. Any brand names or logos are the registered trademarks of their respective owners. Any use of any brand name or model designation for this product is made solely for purposes of demonstrating compatibility.