Cut out humidifier filter wick according to the length of original one. Suitable size for your daily use. Characterized by good elasticity, uniform pore distribution, strong water absorption. Sufficient quantity: you will get 40 pieces white humidifier filter wicks, each one is approx.10 cm/ 4 inch in length and 0.3 inch in diameter, compatible for most portable personal USB mini humidifier, please make sure your length and diameter before purchase Good water-absorption: the humidifier filter stick is characterized by good elasticity, uniform pore distribution, strong water absorption, good storage capacity and volatilization stability Quality material: the humidifier stick is made of filter material, insoluble in water and not easy to stick, supports most kinds of perfume, liquid and other water solvents, help your humidifier work better Extend the life of humidifier: come and replace the filter with humidifier sticks, when the humidifier produce less steam or even stop work and even become more and more hot, prolong the life of the humidifier Easy to use: humidifier wicks are simple to remove and install, allow you to finish installation in few seconds, please soak a filter stick to be wet completely before inserting to the humidifier; It is recommended to use tap water and don't drip in essential oils to be soaked