The Laerdal-182-40010 RJ QCPR Airway Lung Foil is a replacement lung set designed for use with the Resusci Junior QCPR manikin. This 5-pack of lung foils ensures hygienic and realistic ventilation training by replicating natural lung expansion and airflow. Easy to install and replace, the lung foils are made from high-quality, durable materials to maintain performance and extend the life of your manikin during repeated CPR sessions.