1. The appearance of the sponge stick is regular and plump. 2. It has good elasticity and is not easy to leak after sealing the bag. 3. Uniform distribution of porosity; strong water absorption, large water storage capacity and stable volatility. 4. It is insoluble in water, non-sticky, and keeps the consistency of the evaporation speed of the water agent. 5. It can be combined with various water solvents such as perfumes and medicinal liquids to filter and store water, which is safe. Product Name: Replacement Cotton Swabs for Portable Personal USB Powered Humidifier. Type: Humidifier Sponge Sticks Color: White Material: Fiber Cotton Size: 73x7mm Package Contents: 50 x Humidifier Sponge Sticks Only the above package contents, other products are not included. Notes: Lighting and different monitors may cause the item color in the picture to be slightly different from the real one. The measurement allowable error is +/-1-3cm.