Features: Material made from filter cotton, good quality. Suitable for USB Water Bottle Caps Humidifier. Help the machine to Diffuse Mist and Purify. Can be sheared in shorter you need. low temperature resistant. Can be Used to filter water. low temperature resistant,filter water filter cotton,Can be sheared Diffuse Mist and Purify Filter Cotton Sticks only ,other accessories demo in the picture is not included. Directions for replacement: 1.Unscrew the water for tank cap 2.Pull out the filter plastic part(notice the sprint on the bottom) 3.Pull out the filter and replace the new filter 4.Pull in the filter plastic part(notice the sprint on the bottom) 5.Screw the water for tank cap Specifications: Material: Filter Cotton Diameter:0.8cm(0.31in) Length:6.4cm(2.52in) Color:White Quantity: 10pcs/1set Package includes: (Without retail package) 10 x Filter Cotton Sticks