Carbon filter removes odors and captures large airborne particulates. Indicator conveniently notifies you when it's time to change the filter. Proper replacement of filter keeps purifier running at peak performance level and extends life of machine. Compatible with AeraMax® Air Purifiers. Air Purifier Filter Type: Carbon; Filtration For: Airborne Particles; Dust; Mold Spores; Odors; Pet Dander; Air Cleaner Compatibility: AeraMax® 9286001; Width: 4.37".