VALUE: The CPAP filters includes 2 reusable large particle filters and 8 Ultra-fine Cpap filters. Universal Replacements for Filters, only fits the Series CPAP and BiPAP machines. EASY to USE: You have not to manually load the CPAP filters into the plastic holders yourself, only to remove the old filter and put in the replacement new filter; you can use reusable large particle filters filter on its own or to use a large particle filters and ultra-fine filters for a finer filtration. FOR HEALTHIER LIFE: filters prevent leakage, better filtering than manually installed kits, filters kit is designed so as to provide you and your loved with the cleanest air to maintain the health. OPTIMAL FILTER REPLACEMENT SCHEDULE: Remember to replace your disposable Ultra Fine filter at least once every 30 days and the reusable foam filter at least once every 90 days for optimal use. [ ] Changing CPAP filters regularly ensures which is essential for your equipment to remain in solid working order for many years. Colour:Navy blue Material:plastic Package Contents: 2 x Reusable Filters 8 x Disposable Ultra-Fine Filters 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.