Features: Brand new and high quality True HEPA Captures 99.97% of airborne allergen including dust, smoke and other particles as small as 0.003 microns in size. Our filters are designed to be fit for your air purifier. They assit your machine in reaching performances and longivity. Our replacement filter element is made of high-strength non-woven fabric and carbon filter to achieve the best performances and improve the quality in the home. Can be tightly fitted without changing tools, ensuring timely replacement of old filter elements. Our advanced filter designed is perfect for your air purifier. They will make your machine achieve the best performances and service life. Specifications: Material:True HEPA Type:HP102/HP601/HP401 HP102:Approx.15.5x13.28cm/6.1x5.23inches HP601:Approx.38.3x63cm/15.07x24.8inches HP401:Approx.38.3x43.3cm/15.07x17.05inches Package Includes: 1x HEPA Filter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.