Features： 1、FITMENT: Oxygen generator machine replacement filter is fit for Haier, fit for Chuangwei, fit for yuwell, and the most suitable one for matching machines. 2、IMPROVE AIR QUALITY: Oxygen concentrator filters prevent small dust particles from entering the tubing system, ensuring you get clean air every time you breathe in. 3、EASY REPLACEMENT: Incredibly easy to replace or dispose of, requiring no special tools or training. Simply remove the old filter and replace with our new filter to maintain the best performance. 4、QUANTITY: Oxygen generator filter cartridge is designed with 5pcs, there are enough of them so that you can use them for a long time and provide great convenient for you. 5、COTTON: Constructed with cotton materials that allow for long lasting performance. They are designed to handle the high pressure and flow of oxygen without compromising their filtering ability. Specification： Item Type: Oxygen Concentrator Filter Material: Cotton Fitment: Fit for Haier Fit for Chuangwei Fit for yuwell Package List： 5 x Oxygen Concentrator Cotton Filters