Compatible Models: Our air purifier filters are For Core 300 / Core 300s air purifiers, with replacement part number Core 300-. Please note: and models mentioned here are for compatibility purposes only and are not products. Value Bundle: You receive 2 replacement filters for Core 300. Note: To better protect your air purifier, we recommend replacing the filter every 3-6 months, depending on your usage frequency. Upgraded Material: The for Core 300 replacement filter uses upgraded material, designed to adsorb 99.7% of suspended particles of 0.3 microns and larger, ensuring highly efficient indoor air purification. This high-quality air purifier filter is ideal for homes with air pollution or open-plan kitchens. High-efficiency filtration: For air purifier replacement filter is equipped with a three-in-one filtration system, including 1. a fine pre-filter, 2. an H13 grade HEPA filter, and 3.an activated carbon filter, which can effectively adsorb cooking fumes, VOCs, and other odors. Color: Yellow Material: ABS Package Contents: 2 x air purification filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.