Compatible with for machines: These fitted filters are compatible with for most machines, as as machines equipped with 22 mm tubes. It gives you more peace of mind while for the recall process. breathing health and safe use: effectively capture the decomposed PE-PUR sound to eliminate black debris and particles in the foam. Effectively prevent potential inhalation risks and the safety of sleep care equipment. Efficiently filter and enjoy : Each filter is precisely made to clean the dirty particles or black dust insects in the air, because it will leave the sleep care machine. Keep the sleep care equipment clean and enjoy the and . Economical replacement, easy to use: It is recommended to replace it 4-6 weeks, a set can meet your long-term needs! Connecting this filter between the machine and the pipe is quick and easy. Maintain strong air flow: If you find that the air flow resistance of the sleep care device is poor, increase the setting of the sleep care device. colour: transparent Material: plastic Package Contents: 9 x CPAP Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.