- Compatible Models: Includes 3 pack of 500/600 Dual Protection Replacement Filters for Blueair Classic 500/600 Series air purifiers (models 501, 503, 505, 510, 550E, 555EB, 580i, 601, 605, 680i). Note: Please confirm your air purifier model before purchase.<br>- Dual Protection Filter: Classic 500/600 Series filter with a Dual Protection Filter System combining an H13 true HEPA layer and an activated carbon layer. Durable construction aims to extend filter life and maintain fresh air.<br>- H13 True HEPA Filtration: Captures 99.97% of particles as small as 0.3 microns, including pollen, dust, and pet dander. Activated carbon reduces smoke, cooking odors, pet odors, VOCs, and other household smells.<br>- Easy to Replace and Install: Remove the old filter and install the new Classic 500/600 Dual Protection Replacement Filter. The HEPA side should face the fan when replacing (the package notes “Facing in” on top). Recommended replacement every 6 months depending on usage.<br>- Practical Uses: Ideal for allergy relief and pet households; effective in reducing cooking and smoke odors; suitable for maintaining clean air in rooms using Blueair Classic 500/600 purifiers.Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.