This filter is suitable as a replacement for the Levoit Core 300 and Core 300S air purifiers. Regularly replacing the filter every six to eight months helps maintain the performance of the air purifier. The replacement filter consists of a three-stage system: The ultra-fine nylon pre-filter captures large particles such as dust, lint, fibers, and hair. The H13 HEPA filter removes 99.97% of fine particles in the air, such as dust, pet dander, dust mites, and pollen. The activated carbon filter effectively combats strong odors.