Sufficient Quantity: You will receive 40 pieces white cotton humidifier steamers, each one is about 10cm/ 4 inches in length and 0.3 inches in diameter, sufficient quantity to meet most of your needs;Practical tools for office, room and travelGood water absorption: The humidifier filter rod is characterized by good elasticity, uniform pore distribution, strong water absorption, good storage capacity and volatilization stabilitymaterial: The humidifier pen is made of filter cotton material, is insoluble in water and not easy to stick.It supports most types of perfumes, liquids and other water solvents and helps your humidifier work betterExtend the life of the humidifier: When the humidifier produces less steam or even stops working and even gets hotter and hotter, extend the life of the humidifier (usually 1 to 2 weeks to change the filter)Easy to use: The humidifier wicks are easy to remove and install.You can complete the installation in just a few seconds.Please allow a filter pen to soak completely wet before inserting it into the humidifier.It is recommended to use tap water and not drip into soaked essential oils (if necessary, adding a small amount of essential oil is acceptable).