Package includes: 2 True HEPA Filters + 4 Carbon Booster Pre-Filters. Designed to fit aer1 ready air purifiers，Replaces A Filter，D Filter，K Filter. Compare to Holmes aer1 hepa-type total air filter HAPF30AT
Compatible with Bionaire UNITS：BAP260, BAP815, BAP825, BAP9200, BAP9700, BAP520, BAP 9417, BAP9427, BAP9435, Package may vary
Compatible with Holmes UNITS：CAP531-U，CAP529-U，HAP240，HAP242，HAP412，HAP422，HAP424，HAP702，HAP706，HAP716，HAP1702，HAP2400，HAP9240，HAP9241，HAP9242，HAP9243，HAP9412，HAP9413，HAP9414，HAP9415，HAP9422，HAP9423，HAP9424，HAP9425
CARBON BOOSTER PRE-FILTER：Absorbs household odor from pets, cooking and smoking. And traps larger air contaminants like hair and lint
TRUE HEPA FILTER WITH H13 GRADE：Captures 99. 97% of pollutants as small as 0. 3 μm such as dust，pet dander. True HEPA Filter keep your Holmes air purifier working at its full capacity
