ULTIMA DUO is a Dual-Head Stethoscope, a sleek looking stethoscope. Lightweight Dual-Head Chest piece and Acoustic Valve Stem are constructed of aluminum and brass, respectively. The Diaphragm side is fitted with an Ultra-Thin Fiber Diaphragm and sealed by the Diaphragm Retaining Ring to produce optimum amplification and high frequency sound transmission of heart and lungs. Both the Diaphragm and Bell are crowned with a non-chill durable PVC Diaphragm Retaining Ring and Bell Ring to provide greater patient comfort. Handcrafted Headset, with soft Ear tips, provides the anatomic fit for extended usage comfort.