Compatibility: This replacement filter set is meticulously designed to seamlessly fit with the 4 in 1 air purifier models that use part numbers F3001 and F3002, ensuring optimal performanceComprehensive Value Pack: The 3000 replacement filter set comes in a 2+2+8 configuration, including 2 H13 HEPA filter, 2 filter, and 8 pre filter, offering exceptional value for maintaining clean airAdvanced Filtration System: Experience air quality with 3 stage filtration system. The H13 HEPA filter are engineered to effectively catches airborne particles, making them ideal for homes with pets and promoting a comfortable living environmentOptimal Replacement Schedule: To maintain air purification efficiency, we recommend replacing the H13 HEPA filter every six months, the filter every four to six months, and the pre filter every two to three months. This schedule may vary based on air quality and usage frequencyHasslefrees Installation: Designed filter easy installation and use Specification: Color: Black and White Material: ABS Size Chart: 33.62cmx3.81cmx41.17cm/13.24inchx1.50inchx16.21inch 33.68cmx2.15cmx41.14cm/13.26inchx0.85inchx16.20inch 33.9cmx0.25cmx41.4cm/13.35inchx0.10inchx16.30inch Package Includes: 2H13 HEPA Filter 2 Filter 8Pre Filter Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.