Nispira 2-in-1 True HEPA Replacement Filter Compatible with Pro Breeze Mini Air Purifier PB-P02 Compared to Part PB-P02F HEPA filter removes up to 99.97 percent of airborne particles as small as 0.3 microns. Preliminary black foam filter to capture big particles such as hair and dust 2 Filters included. Filter dimension: 3.75 x 3.75 x 2.25" inches. Easy to install. Recommend to replace the filter every 2 months to optimize the performance. 100% customer satisfaction guaranteed. Quality meets or exceeds leading national brands Nispira 2-in-1 True HEPA Replacement Filter Compatible with Pro Breeze Mini Air Purifier PB-P02. Compared to Part PB-P02F. HEPA filter removes up to 99.97 percent of airborne particles as small as 0.3 microns. Preliminary black foam filter to capture big particles such as hair and dust. 2 Filters included. Filter dimension: 3.75 x 3.75 x 2.25" inches. Easy to install. Recommend to replace the filter every 2 months to optimize the performance.