Beeswift Ambu Mk4 Bag Adult With OxygenThe Ambu Mk4 IV Adult Resuscitator features the unique Ambu double wall concept, setting it apart from all other manual resuscitators. Designed for superior control, safety, and durability, it ensures effective artificial respiration in emergency situations. Key Features: Ambu Double Wall Concept. Thin outer cover gives excellent fingertip feedback. Inner lining with air holes enables rapid recoil for optimal stroke volume. Prevents airway pressure