Features: High efficiency fiber cotton construction ensures filtering impurities, suit for various cool mist portable diffusers and USB mini humidifiers. Specially treated wicks combine quick absorbing performances with extended service life, maintaining consistent evaporation while reducing replacement frequency. Ideal for households seeking bedroom air quality improvement, traveler requiring portable moisture solution, and professionals needing desktop humidity control in office environments. Perfect for enhancing air moisture in small spaces use with car diffusers during road trips, bedside humidifiers for better sleep, or office mini units to combat dry environments. Each 50 pack contains precisely sized replacements that maintain original equipment performances, crafted from safe materials meeting international safety standards for worry free operation. Specifications: Material: Cotton Size: Approx.0.8x15cm/0.31x5.9inch Weight:50g Quantity:50pcs Package Includes: 50pcs Humidifier Cotton Filter Sticks note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you will not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color about the item.