Features made from filter cotton,good Note: 1.Transition: 1cm=10mm=0.39inch2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item Suitable for USB Water Bottle Caps Humidifier. Help the machine to Diffuse Mist and Purify Cutting-papers/fabrics are easy to be cut and removed.Can be arranged and rearranged on stamp blocks in virtually.Doing a unique and for unique your dear Can be sheared in shorter you needLow temperature resistant,filter waterDiffuse Mist and Purify