The Innosonian America-S16105 Chin Piece Unit is an essential OEM replacement component engineered specifically for the Brayden Pro Adult CPR training manikin series. This internal structural unit forms the foundational framework for the manikin's lower jaw and oral cavity, playing a critical role in facilitating realistic head-tilt/chin-lift and jaw-thrust maneuvers during airway management training. Constructed from high-impact polymer, this unit houses the internal attachment points for the face skin and artificial lung/airway system, ensuring a tight seal for hygienic, leak-free rescue breathing simulations.