Features: 1[Prevent Dust] The high efficiency activated carbon filter helps provide greater protection against dust smoke and toxic compounds. 2[Double Sided Prefiltering] Four stage design and double sided prefiltering can more effectively prevent pollution spread by dust and wildfire smoke. 3[Simple To Replace] This filter screen is easy to replace and disassemble which improves the overall efficiency of the air purifier. 4[High Efficiency Particulate Air] H13 True high efficiency particulate air filter effectively captures 0.3 micron air particles at least 99.97% so you can use it with confidence. 5[Widely Compatible] Filter screen is fit for LEVOIT Core 300RFWS can be widely compatible with your machine to meet your various need. Specification: Item Type: Air Cleaner Filter ScreenMaterial: ABS+high efficiency particulate airProduct Size: Approx. 19.3 x 15 cm / 7.6 x 5.9 inFitment: Fit for LEVOIT Core 300-RF-WSWeight: Approx. 600g / 21.2oz Package List: 1 x Filter Screen