1. The appearance of the sponge stick is regular, full 2. Good elasticity, water is not easy to leak after sealing the bag. 3. Porosity is evenly distributed; the water absorption is extremely strong, the water storage capacity is large, and the volatility is stable. 4. It is not soluble in water, non-sticky, and keeps the consistency of the evaporation rate of the water agent. 5. It can be matched with various types of perfumes, liquid medicines and other water solvents, filter and store water, and is safe. Product name: Replacement cotton sticks for Portable Personal USB Powered Humidifier Cotton sticks. Type:Humidifier Sponge Sticks colour: white Material: fiber cotton Size: 73x7mm Package Contents: 50 x Humidifier Sponge Sticks Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.