H13 High-Efficiency Filter Combo Set. (1 H13 True Hepa + 1 Activated Carbon Filters + 6 Pet Hair Pre-Filters) | | Fully Compatible With Winix Hr900 Ultimate Pet Air Purifier, Part Number 1712-0093-00 /Filter T And 1712-0094-00 /Filter U | | H13 True Hepa Capture Up To 99.97% Of Airborne Particles As Small As 0.3 Microns. This Includes Dust, Pollen, Pet Dander, Smoke, And Other Minute Particles ,Activated Carbon Reduce Chemicals Vocs, Tobacco Smoke, Pm2.5,Common Household Bad Smell,Pet Hair Fine Filters Prevents Large Particles Such As Dander,Pet Hair | | Please Replace Regularly To Keep Your Machine Fresh And Clean,For Best Results, Remove The Filter Once A Month And Clean With A Soft Brush Or Gently Vacuum. | | Top-Notch Quality Used For Maximum