General description The 4X Air Purifiers Replacement Filter set includes essential components to maintain optimal air quality. Each filter is designed to effectively purify the air by capturing pollen, smoke, pet dander, and PM2.5 micrometer air pollution. Technical specifications Dimensions: 2.56 x 2.56 x 3.74 inches Color: White Material: Plastic Package Contents: 4 x Air Purifier Filter Measurement allowed error: +/- 1-3 cm Compatibility and accessories Compatible with air purifiers that utilize pre-filters, HEPA filters, and activated carbon filters. Usage Recommended replacement cycle: every 3 to 6 months Filter life may vary based on operating time and air conditions.