FELLOWES FEL9324201 Carbon Filter for AeraMax Air Purifiers Purify Technology: Carbon Height: 16 1/8 Width: 12 7/16 Length: 3/16 Feature: Carbon filter removes odors and captures large airborne particulates. Indicator conveniently notifies you when it's time to change filter. Proper replacement of filter keeps purifier running at peak performance level and extends life of machine