Four filters included Washable and reusable design for long term use PTFE filter with H12 filtration class; retains 99.95% of particles down to 0.3 micron 100% compatible with original filter; easy replacement without changing the setup Key benefits High efficiency filtration for fine particles, helping improve indoor air quality Lower long-term costs and waste due to washable and reusable filters Reliable compatibility with the original filter, ensuring proper fit and performance Specifications and attributes Material: PTFE Filtration class: H12 Particle retention: 99.95% of particles down to 0.3 micron Compatibility: 100% compatible with original filter Includes: Four filters Use scenarios Home air purification and ventilation Replace or upgrade the original filter in home purifiers to reduce fine dust, pollen, and smoke particles, helping maintain cleaner indoor air. Workshop and hobbyist projects Use during woodworking, sanding, grinding, or painting to capture fine dust and maintain a cleaner workspace with high filtration efficiency. Maintenance of original filter systems Suitable for any device designed for an original filter; the washable design provides cost savings and reduced waste while preserving fit and performance.