50 CPR Training Valves!! Contains a one-way filter that blocks the flow of contaminants, helping the user keep proper hygiene during CPR training. Simulates the function of a real CPR valve, leading to a realistic CPR training experience, and other standard CPR training equipment. Our training valves fit all standard CPR (Adult, Infant, and Child). This bulk pack is perfect for training centers. Please note: The valves are for training purposes. Replacing as necessary. The valves are not reusable.