✅This filter a complete replacement set which includes 3 x Smokestop HEPA Filters
✅Fits Blueair 500/600 Series Air Purifiers Classic 501 503 510 550E 555EB 601 603 650E 505 605
✅True HEPA filter removes 99.97% of airborne contaminants like pollen, smoke, pet dander, etc
✅Also eliminate fine and ultrafine particles.With additional sheets of activated carbon to remove gaseous pollutants like tobacco smoke VOCs.
✅Please replace your filter regularly to keep your machine fresh and clean.