Prestan Professional's Rescue Mask adapters are for use when training with CPR rescue masks. Use these affordable, disposable adapters in place of expensive filter and valves for cost-effective training. 

The valve features an integral air filter that obstructs the flow of contaminants and they fit all standard rescue masks (15mm I.D. or 22mm O.D.). The adapters do not include a rescue mask. Replace the mask's original valve and filter assembly after training.