[Well Compatible]This air filters is compatible with for LEVOIT Core 300 air purifier and Core P350 air purifier, part number for Core 300-RF and Core P350-RF, H13 three-in-one filtration system.[High-efficiency Filtration]3-stage air filtration system (pre-filter, activated carbon filter and true HEPA filter) effectively removes 99.97% of airborne particles as small as 0.3 Micrometre.[Improve Air Quality]3-IN-1 TRUE HEPA filters can remove large and airborne particles and fabric fibers,also reduces unpleasant household odors and tobacco smoke.[Easy to Install Clean]Changing the consumable replenishment filter every 6~8 months for better protection of your air purifiers.No extra tools needed.[Note]filter is sealed to maintain the best effect, please remove the filter from the plastic bag before placing into for the LEVOIT Core 300 air purifier.for Core 300 replacement filter Core 300 air purifier 3 in 1 pre-filter H13 True HEPA High Efficiency Activatedcolour: whiteMaterial: plasticSize: 193x150mmPackage Contents:2 x air purifier filter1 x brushOnly the above package content, other products are not included.Note: Light shooting 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.