Replacement filter for Core 300 air purifier, HEPA filtration[Compatible Models] Core 300 replacement filter elements are designed to be fully compatible with Core 300 / Core 300S air purifiers and include a 2-pack of replacement filter elements to optimal performance. Compared to Part Core 300-RF. Please note that the name or model name of this product is used only to demonstrate compatibility.<br> [3-in-1 Filtration]The Core 300 replacement filter elements features a 3-in-1 HEPA filtration system. It combines a nylon pre-filter, HEPA filter, and activated carbon filter to effectively capture large particles, pet dander, pollen, odors, and more.<br> [Affordable]We recommend replacing the Core 300 air purifier filter every 6-8 months for optimal performance, depending on use and environment. Easy to install without tools. Simply replace the filter as needed.<br> Colour:Photo Color<br> Material:ABS<br> Package Contents:<br> 1 set x air purifier filters (pack of 2)<br> Only the above package content, other products are not included.<br> 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.