Brand new in Box 2 Filters, $70 OBO 【COMPATIBLE WITH】Premium True HEPA Replacement Filter Sets Compatible with Blue air 121 purifier filter 【VALUE PACK】Pack includes 2 True HEPA activated carbon pre-filters, bringing you great value and great price. 【H13 GRADE TRUE HEPA FILTER】This Blueair 121- compatible air purifier filter fit perfectly with the Blueair 121 filter model, just like those from the OEM.It can capture 99.7% of particles as small as 0.3 microns 【STRICT PRODUCTION PROCESS】from the selection of raw materials to the professional operation of production, ensures the quality of the filter element and provides health protection for you and your family! We deserve your trust with the most affordable purchase price 【PERFECT AFTER-SALES SERVICE】Customer service is always on-line and can reply to your message within 24 hours. If you are not satisfied with the product, you can apply for a refund at any time and get 100% satisfactory service.