The CPR Mask with Hard Case is pocket-sized resuscitator mask made with a high-efficiency and low resistance one-way valve to help minimize the possibility of cross-contamination. When someone goes into cardiac arrest performing Cardiopulmonary Resuscitation (CPR) dramatically helps keep a victims chances of survival stable and maintains a flow of oxygenated blood to their heart and brain until emergency responders arrive with a defibrillator to restart the heart. This 15mm O.D. connector can be attached to any standard ventilation and oxygen equipment for use on adults, and inverted for use with infants and children. Available at Mountainside Medical Equipment, Inc.