[PRODUCT SPECIFICATIONS ]: This high-efficiency Core 300 filter replacement capture 99.97% 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 cleaning need. It is recommended to replace filters for every 6-8 months.[REPLACEMENT PART No.]: Core 300 Filters compatible for Core 300 purifier and Core P350 purifier, part number Core 300-RF & Core P350-RF.It is recommended to replace filters for every 6-8 months.[QUALITY]: Purifier replacement filters improve your quality & neutralize odors for a clean & healthy breathing experience year round with replacement filters for cleaners & purifiers.For best performance use only Replacement filters. Each purifier's performance is tested as a system with the filters for best efficiency.Colour:whiteMaterial:plasticSize:193 x 150mmPackage Contents:3 x purifiers filter3 x brushOnly 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.