• Nispira premium True HEPA with preliminary filter and activated carbon replacement filter compatible with Rigoglioso Air Purifier GL-2109 or GL2109. 
• Preliminary filter traps large particles such as hair, dust. True-HEPA captures up to 99.97% of particles, as small as 0.3 microns. Activated carbon layer to deodorize any unfavorable household odor such as smoke, cooking smell, chemical, pet odor etc. 
• 1 pack included. Suggest to replace filter every 6 months to optimize performance. 
• Easy to install. Dimension 5.4" x 5.4" x 4.5". 
• Quality meets or exceeds leading national brand.