Available in Adult/Child or Infant sizes, the BVM trainers are designed to look and function just like an actual Bag Valve Mask resuscitator and because they are for training only, they are the most cost-effective options for your training program. Includes 4 Practi-MASK CPR Training Masks, 4 Bag Valve Squeeze Bags, and 4 Reservoir Bags. Latex-free.