General description High-density HEPA filters capture up to 99.97% of airborne particles at 0.3 micrometers, effectively removing pet dander, dust, and hair. This replacement pack includes 2 HEPA filters and 10 sponge filters, designed to improve air quality and promote a healthy living environment. Technical specifications Color: as shown Material: Plastic Package Contents: 2 HEPA Filters, 10 Sponges Measurement allowed error: +/- 1-3 cm Installation Easy to install, no tools required. Recommended replacement every 6-8 months or depending on usage and environment.