1、Compatibility: This air purifier filter set includes 2 filters, and is specifically designed to fit for Medify MA 25 air purifiers, including models for MA 25 B1, S1 and W1. 2、Efficient Filtration: The filter is highly effective in air purification, filtering particles as small as 0.3 microns, including viruses, microbe, dust, pollen, etc., with a cleaning efficiency of up to 99.97%. 3、Activated Carbon: The activated carbon design of the filter can absorb and eliminate strong odors and chemical gases, helping to improve indoor air quality. 4、Convenient Replacement: The air purifier filter can be easily replaced within a short period of time, without the need for any professional tools, making cleaning hassle free. 5、Routine Maintenance: It is recommended to replace the filter every 3 months. In highly polluted environments, more frequent filter replacements may be required to extend the lifespan of the machine. Item Type: Air Purifier Filter Material: High efficiency particulate air filter Weight: Approx. 447.00g/15.77oz Product Size: Approx. 17x24.2x3.8cm/6.7x9.5x1.5in Applications: Suitable for Medify MA 25 (including for MA 25 B1, S1, W1) 2 x Air Purifier Filters