PUREFLOW 2003 Hyundai Sonata Cabin Air Filter with HEPA and Antibacterial Technology, PC5675AHX PC4211X Includes four 17x21x1 MERV 11

Includes four 17x21x1 MERV 11 air filters for routine filter changes in residential HVAC systems

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PUREFLOW 2003 Hyundai Sonata Cabin Air Filter with HEPA and Antibacterial Technology, PC5675AHX PC4211X Includes four 17x21x1 MERV 111st Stage: For drivers and passengers who suffer from severe allergies, PUREFLOW HEPA (High Efficiency Particulate Air) offers 99. 97% efficiency, capturing microscopic pollutants including pollen and other allergens (may result in a minor restriction to airflow). 2nd & 3rd Stage: Activated charcoal adsorbs harmful gases like carbon monoxide and sulfur dioxide. This layer is combined with baking soda to absorb bad odors. 4th Stage: Advanced