Cartridge Replacement Filter Kit for SC 2 Machines or Most CPAP Filter Parts Accessories Include 4 Cartridge Filters and 4 Check Valves.
Activated Carbon Filters – Activated Carbon air filters are used to remove the gases in the machine.
For your health, it is recommended to change it every 6 months.
Check Valves – The check valve is are designed to prevent water from getting into inner the working of machine.(Including 4 check valves)
Save Your Money – We are committed to providing more cost-effective product for our customer, you can save yourself some money so that you do not have to buy the overpriced of a name brand activated carbon filters.