You will get 30 pcs humidifier cartridges, each one is about 80mm(3.1 inch) in length and 0.2 inch in diameter, suitable for most humidifiers, please confirm your length and diameter before purchase. Humidifier swabs are made of fiber cotton material, durable, insoluble in water, not easy to stick. Uniform distribution of porosity, strong water absorption, large water storage capacity. Humidifier wick is easy to disassemble and install, the installation can be completed in a few seconds, please completely wet the cartridge before inserting it into the humidifier. The appearance is regular, full, white color, good elasticity, not easy to drip. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia