: MA-15 replacement filter exclusively designed for MA-15 MA-15-W1 MA-15-S1 air purifier, compare to part MA-15R-1 MA-15R-2, including H13 HEPA replacement filter and activated carbon pre-filter.(Please check the model you need before purchase) 3-STAGE FILTRATION: MA-15 replacement filter has a high-density nylon pre-filter that can trap large particles, H13 true HEPA 99.9% particle removal for filter and high-efficiency coconut shell activated carbon filter that can remove odors.Provide a comfortable and safe environment for your children and family. 3 IN 1 FILTERS: MA-15 Filters are made of 3-in-1 filtration systems including Pre-Filter, True HEPA Filter and Activated Carbon Filter.Fine Pre-Filter remove large particles such as hair, pet fur, dander and lint. True HEPA filter remove particles like household dust, and pollen, etc. Activated carbon filter helps to strongly remove unwanted odors, smoke, VOCs and more. Easy to install and clean: Easy to install, no tools required. True HEPA filter is essential for households with Children, Seniors, Pets, Allergy, smokers and Asthma sufferers. Replacement Cycle: The use of a new filter can improve the efficiency of your air purifier, thereby ensuring fresh and safe air in the room. It is recommended to replace the filter every 6 months. Material:composite material colour:As Shown Package Contents: 4 x Air Purifiers Filters Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.