Fine preliminary Filter traps larger particles in the air like dust, hairs, pet fur, lint and morePremium H13 grade true HEPA filter captures 99.97% of airborne particles down to 0.3 Micrometres in sizeHigh-efficiency activated carbon filter absorbs household odors from pets, cooking, smoking, wildfire, and harmful VOC'sRegular filter replacement: for optimal filtration and strong suction performance, regular filter replacement is recommendedRECOMMENDED REPLACEMENT: It is recommended that the filter be replaced every 4-6 months to optimal results.[Product Name]: Compatible with () air purifier filter element[Compatible model]: for 4lite[Product use]: Purify the airColour:blueMaterial:plasticSize: 200 x 307MMPackage Contents:2 x Air Purifier FilterOnly 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.