Material: Made of high-quality materials, our humidifier filter core has good water absorption performance, you can soak in water without worrying about deformation and pilling, allowing you to enjoy a good state and bring you a good mood. Filter replacement: The humidifier filter rod should be replaced 3 to 4 months after . According to the usage and water quality, keep the replacement frequency reasonable and regular to make the spray clearer and bring you a better filtering effect. Good water absorption: The humidifier filter rod has good elasticity, uniform pore distribution, strong water absorption, good capacity and good volatilization stability. How to : Just cut the humidifier stick into a suitable size and put it directly into the humidifier. You can also completely immerse the replacement stick in the water and then put it into the humidifier to get better filtration performance. Appropriate size: Each humidifier wick has a diameter of about 8 mm/0.32 inches and a length of 100 mm/4 inches, the size is appropriate to meet your daily needs, and it is easy to cut into the appropriate size to fit your humidifier.50 humidifier replacement sticks, allowing you and your family to replace enough, which can you with a long-term experience. Material:cotton colour:White Package Contents: 50 x Sponge Sticks Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.