[PRODUCT SPECIFICATIONS]: This high-efficiency Core 300 Air filter replacement capture 99.97 percent of airborne particles and odors, great for households with pets, cooking and smokers. With cost-effective price to save much cost for your all year round air cleaning need. It is recommended to replace filters for every 6-8 months. [REPLACEMENT PART Number]: Core 300 Air Filters compatible for Core 300 air purifier and Core P350 air purifier, part number Core 300-RF Core P350-RF.It is recommended to replace filters for every 6-8 months. [QUALITY]: Air Purifier replacement filters improve your air quality neutralize odors for a clean healthy breathing experience year round with replacement filters for air cleaners purifiers.For best performance use only Replacement filters. Each air purifier's performance is tested as a system with the filters for best efficiency. Colour:White Material:plastic Package Contents: 2 x hepa filter 1 x clean brush 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.