This item is a set of 10 humidifier replacement filters, which is manufactured with top-class material for safe use with quality. The cotton head with comfortable texture will ensure its practicability and popularity for any field use. With independant package, more and convenient to carry. Suitable for humidifier or other nbulizers. Features - Color: White. - Material: Cotton. - Size: 12.8 x 0.8 x 0.8cm. - Cotton Material: Made of filter cotton material , porosity distribution,absorbent particularly strong, water storage capacity, volatile stability,help your humidifier work better. - Protect humidifier: When you find the diffuser/humidifier produce less steam or even stop work, and the machine become hot ,try to replace the filter and no worry about the service life about the humidifier.Usually 1 to 2 weeks. - High Effective :Not water-soluble, non-stick blocking filter will enable a of water steam to freshen the air, which will ensure your ability to breathe more comfortably. - Appropriate Size：The filter cotton sticks compatible for USB water bottle caps humidifier, can be sheared in shorter for your own diffuser with the same size. - Suggestion:To see a better performance,we advise user to soak a filter stick to be wet completely before inserting to the humidifier and turning it on. - Warm Tip: Dear buyer, due to lighting effect, monitor’s brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 20 x Cotton Sticks