MDI CPR Microshield ? Mask The MDI CPR Microshield Mask is mouth barrier designed to protect responders performing CPR. Lightweight and very compact, the MDI CPR Microshield Mask features clear, thin, flexible barrier with a 1.75 inch ventilator tube. The ventilator tube on the MDI CPR Microshield Mask is equipped with a one-way valve to prevent backflow during cardiopulmonary resuscitation. Buy your MDI CPR Microshield Mask from ActiveForever today! MDI CPR Microshield Mask Features: Lightweight and compact Acts as a protective barrier during CPR One way valve prevents backflow during resuscitation Venitlator tube MDI CPR Microshield Mask Specifications: Ventilator tube length: 1.75 inches Available individually, or in cases of 10 or 50 Related Searches: first aid, cpr masks