Features: Keep your USB humidifier running smoothly with our 10-pack of replacement cotton sponge sticks. Made of high-quality cotton material, these sponge sticks provide excellent absorption and filtration for your humidifier. Ideal-for anyone who uses a USB-powered personal-humidifier to improve air-quality and create a more comfortable living or work space. Perfect for use in bedrooms, offices, and other small spaces where dry air can cause discomfort or health issues. With four different sizes to choose from, you can easily find the-right fit for your humidifier and enjoy clean, fresh-air wherever you go. Specifications: Material:Cotton Size:Approx.8x105mm/0.31x4.13inch Size:Approx.8x140mm/0.31x5.51inch Size:Approx.8x80mm/0.31x3.14inch Size:Approx.8x98mm/0.31x3.85inch Color:White Package Includes: 10pcs Cotton Sponge Stick note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.