HIGH QUALITY AIR FILTER designed to replace your humidifier filter and help restore clean air. Promotes a healthier lifestyle by reducing the release of limestone, bacteria, germs, and fungi into the air. Safe and effective for maintaining clean indoor humidity. EASY TO INSTALL – simply remove the old filter and insert the new one to quickly resume operation. ANTIMICROBIAL TREATMENT helps inhibit the growth and spread of mold, fungus, and bacteria on the filter. Helps remove minerals and pollutants from water. Ideal replacement for natural evaporative cool mist humidifiers. Replace the filter every 2 weeks for optimal performance. Color: White Material: Composite material Package Contents: 4 x Humidifier Filter Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.