The OlitAir 8 Pack Replaceable Filter Media is designed for use in 12x12x1 MERV 8 filters, providing high efficiency filtration for both air conditioners and furnaces. Made with pleated paper filter frame material in the United States, these filters are effective in improving indoor air quality. With the OlitAir brand reputation for quality, this 8 pack ensures that you have a steady supply of replacement filters to keep your heating and cooling systems running smoothly.