The Isinlive FILTER R and Pre-Filter A is a set of 2 HEPA filters and 8 carbon filters designed for air purifiers. The filters have a lifespan of 6-8 months and have a MERV rating of 17. Made with activated carbon technology, these filters effectively trap pollutants and allergens, improving indoor air quality. The white and black filters are made with paper filter frame material and are suitable for use in home and garden settings to provide clean and fresh air. Ideal for maintaining a healthy environment, these filters are a reliable choice for those looking to improve their indoor air quality.