Description: 【Sufficient Quantity】: You will get 40pcs humidifier filter sticks, fit for most portable personal USB mini humidifiers, please make sure your length and diameter before purchase. 【Good Water Absorption】: The humidifier filter stick can uniform pore distribution, strong water absorption, support various types of essential oils, perfume , liquid, and others. 【Durable Material】: The humidifier stick is made of fiber material, insoluble in water and not easy to sticks, supports most kinds of solvents, help your humidifier work better. 【Replacement】: Refill replacments swab for mini diffusers humidifiers. 【Easy to Use】: Mini humidifier filters sticks are simple to remove and install, allowing you to finish installation in few seconds, please soak a filter stick to wet completely before inserting to the humidifier. Specification: Material: Fiber Cotton Size Chart:7mmx15cm/0.28inchx5.91inch Package Includes: 40 Filter Swabs(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.