Comprehensive Filtration: This replacement purifier can effectively capturing large particles such as hair, and pet dander. The true HEPA purifier can captures 99.99% of airborne particles and household odors as small as 0.03 micronsActivated Carbon Pre Purifier: The large activated carbon layer helps eliminate unwanted odors from pets, cooking, and other sources, leaving your home smelling fresherMaterial: Made of quality ABS materialc, ensuring long term performance and reliability in maintaining clean air in your homeEasy Installation: Changing the purifier is quick and needn't tools, just change the old purifier for a newWarm Notice: For efficient working of the purifier, replace the HEPA purifier every every about 6-8 months and the pre purifier every 2-3 months Size Chart: True HEPA Purifier: 40cmx11.9cm/15.75inchx4.69inchCarbon Pre Purifier: 40cmx11.9cm/15.75inchx4.69inch Package Includes: Optional Package1True HEPA Purifier and 1 Carbon Pre purifieror2 True HEPA Purifier and 8 Carbon Pre purifier Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.