compatibility: This HEPA filter replacement is designed to fit the Baby Brezza Bottle Washer Pro exactly, providing seamless integration and reliable operation without modification. Cleaner bottles, healthier environment: The HEPA media captures up to 95% of fine particles such as dust, pollen, and pet dander, reducing airborne contaminants that can settle on washed bottles and accessories. Maintain performance month after month: the filter every 1–2 months with normal daily use to preserve consistent airflow and filtration efficiency. This listing includes a 4pack so you can cover an entire year of regular use. Built for easy use and durability: Filters are manufactured to the correct size and shape for the Bottle Washer Pro and packaged individually. Durable construction holds up under routine washing cycles and handling. Quick, tool installation: Remove the old filter, take the filter out of its plastic bag, and insert it into the filter compartment. No tools or calibration required. What it solves: Prevents buildup of airborne particles inside the bottle washer that can recontaminate cleaned items. Helps families with allergies or pets reduce potential irritants on baby bottles and accessories. Keeps machine airflow consistent, helping the Bottle Washer Pro run efficiently. Practical use scenarios: 1. parents living in urban areas with pollen or dust levels who want to keep bottles and nipples cleaner between washes. 2. Households with pets where pet dander can settle on baby feeding items; regular filter changes help minimize recontamination. 3. Daycare or sharedcare settings where multiple bottles are washed daily and maintaining steady filtration and airflow is important. What's included: Four HEPA replacement filters compatible with Baby Brezza Bottle Washer Pro; each packaged for protection and ready for immediate installation. Note on maintenance: Follow the recommended replacement interval (every 1–2 months based on daily use) to ensure continued capture performance and airflow.