Perfect For Winix C545: Fully Compatible With C545 B151, P150, And 9300, Fit Like A Glove. Package Contains 2 Pack Washable Pre-Filter, 4 Pack H13 True Hepa Filters And 8 Pack Carbon Filters. Work Like Original Ones But At Good Price | | High Efficient Filtration: Washable Pre-Filter Filtering Pet Fur, Dander, Hair, And Fiber. Carbon Filter Absorb Houshold Odors From Pets, Cooking And Smoking. It Also Helps Prolong The True Hepa Filter Lifespan | | Easy Installation: It Is Recommend To Clean Pre-Filter 2-3 Weeks, Replace Carbon Filter 2-4 Months And Hepa 8-12 Months For Optimal Performance (Depend On Usage And Environment). It Is Fairly Easy To Install The Filter, No Tools Required, Simply Take Out And Replace From Your Machine Unit When Needed | | Super Craft: C545 Replacement Filter Is Made Of High Quality Non-Woven Fabric And Activated Carbon, Both Adopt Advanced Lower Energy Consumption And Lower Density Structure Technology Verified By The Manufacturer, With High.