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: 7mmx8cm/0.28inchx3.15inch Package Includes: 40 Filter Swabs Note: Please allow slightly errors due to manual measurement and different monitors.