The Innosonian America-S16104 Rib Frame is an essential OEM replacement structural component designed specifically for the Brayden Pro Adult CPR training manikin series. Positioned within the torso assembly, this internal framework replicates the mechanical structure and flexibility of the human thoracic cage. It houses the compression depth sensors and anchors the chest spring mechanism, ensuring accurate chest rise, proper compression resistance, and reliable real-time CPR metric tracking during BLS and ACLS training.