Specification: 1. Material: Cotton 2. Color: White 3. Size: 7(Diameter) x 135(Length)mm. 4. To see a better performance,we advise user to soak it to be wet completely before inserting to the humidifier and turning it on. 5. According to our tests, the filter is compatible with pig shaped, mushroom shaped, USB bottle shaped, and portable diffuser if you cut it into same length with original filter.
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