Diffuser Cotton Filter, Difusor Agua Difusor Aire Humidifier Cotton Filter Stick Humidifier Cotton Swab for Family for Room 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.