[Product Specifications]: This high efficiency core 300 replacement air filter captures 99.97% of airborne particles and odors, perfect for households with pets, cooking and smokers. With cost-effective price to save much cost for your year-round air cleaning need. It is recommended to replace the filters every 6-8 months. [Spare part number]: Core 300 air filters compatible with LEVOIT Core 300 air purifier and Core P350 air purifier, core part number 300-RF and P350-RF.It core is recommended to be replaced filters every 6-8 months. [Quality]: Air Purifier Replacement Filters Improves air quality and neutralizes odors, ensuring clean and healthy breathing all year round with replacement filters for air filters and purifiers. For best performance, use only replacement filters. The performance of each air purifier is tested as a system with filters for best performance. Color: white Material: plastic Size: 193 x 150 mm Package contents: 1 x filter air purifiers 1 x brush Only the above package content, other products are not included. Note: Light shooting and different displays may cause that the color of the item in the photo will be slightly different than the real one. The measurement error is +/- 1-3cm.