Blueair Classic 400 Series Genuine Dual Protection Filter Classic 403, 405, 450E, 480i, 490i The Blueair 400 Series Dual Protection Filter uses pure, high-porosity coconut carbon efficiently removes gaseous pollutants from your home 4x faster than other filters, including household chemicals and cleaners, volatile organic compounds and odors from pets, cooking and smoking. No chemical additives Free of chemical additives, this filter uses pure, high-porosity coconut carbon to remove odors. Filter fibers resist bacteria and mold growth. (2) TWO AVAILABLE. Asking only $40 EACH *I ACCEPT CASH, VENMO AND PAYPAL ONLY. **DELIVERY IS AVAILABLE FOR AN ADDITIONAL FEE. ***PLEASE DMS / TEXTS ONLY, I DO NOT RESPOND TO CODED MESSAGES.