Blueair HEPA Particle Filter Set for 501, 503, 550E, 601, 603, and 650E Series filter systems.
This is the new and improved media filter and air flow will result in much better efficiency and performance!
These filters need to be changed every 6 months as required by Blueair to maintain peak performance and assure warranty compliance!
Measures 13" x 9.5" x 8.5"
Comes three per pack.
