Feature: 1. Using high‑quality fiber cotton material, it is suitable for most humidifiers, atomizers and aroma diffusers. 2. The porosity is evenly distributed, strong water absorption, and large water storage capacity. 3. Stable volatility, non-water-soluble, non-stick, and maintain the consistency of water volatilization rate. 4. The humidifier cotton swab has a regular appearance, fullness, good elasticity, and not easy to drip leakage. 5. It can be matched with various types of perfumes, liquid medicines and other water solvents to filter and store water. Specification: Item Type: Cotton Swab Filter Material: Fiber Cotton Weight: Approx. 31g / 1.1oz Size: Approx. 8x100mm / 0.3x3.9in Applicable: Humidifier, perfume volatilization, atomizer, aromatherapy machine. Package List: 30 x Cotton Swab Filter Note: 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. It is recommended to replace it once every 2‑3 months or when the amount of fog is small.