3-Packs Replacement CPAP Cartridge Filters Kit - Includes 3 Cartridge Filters with 3 Check Valve - Generic Cartridge Carbon Filter Assembly Supply by XINUGUI;

Features:
* This Premium filter kit includes 3 replacement filters and 3 replacement check valves for cpap cleaning machine.
* The filter and check valve should be replaced every six months.
* The cartridge filter can convert the activated oxygen back to regular oxygen as it leaves the chamber.
* The valve help keep any water away from the CPAP machine.

Package Included:
3 x Replacement Cartridge Filter With O-ring
3 x Replacement Check Valves
1 x Retail box
1 x Installation Instruction