Description:Nispira replacement filter True HEPA + Activated Carbon Pre Filter Compatible with Germguardian Air Purifier Model AC4200W. Compared to Part FLT4200 Filter L High quality HEPA filter captures 99.97% of airborne particles down to 0.3 microns. Replaceable activated carbon Pre-filter deodorizes any unfavorable household odor and traps the dust 3 pack included. Approx dimension: 6.5 x 6.5 x 4 inches. Suggested to replace every 6 months for optimal performance.100% customer satisfaction guaranteed. Quality meets or exceeds leading national brand