[Perfectly Compatible with for Philips 600 Series]: The HEPA replacement filter is compatible with Philips AC0650/10 AC0651/10 600 series air purifiers, part number FY0611/30. Please confirm the machine model before purchase to avoid incompatibility. [3 STAGE FILTER SYSTEM]: The replacement filter is suitable for Philips FY0611 air purifiers, and has an excellent 3-stage filtration system (① Ultrafine nylon pre-filter ② H13 true HEPA filter ③ activated carbon filter), which can filter 99.97% of air particles with a filter accuracy of only 0.3 microns. So you get rid of the problems with chemical volatile organic compounds (VOC), tobacco smoke, PM2.5 and common household odours. [Household utensils]: The fine mesh layer prevents large particles such as dander and pet hair, and also traps dust, pollen, smoke and other tiny particles. In less than two months, you can see the effect of filtering pet hair and dandruff. The highly efficient activated carbon filter is filled with more activated carbon particles, which can better absorb odours and are an ideal choice for allergy sufferers, pet owners and smokers. [REGULAR REPLACEMENT]: Replacement Filter Size:7.3 inches (Length) x 7.3 inches (Width) x 6.8 inches (Height), fully compatible with Philips 600 series air purifiers. To ensure your air purifier achieves the best air purification effect, we recommend replacing the filter every 4-6 months. Colour:As Shown Material:Plastic Package Contents: 1 * filter Only 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.