Harvey DLX Chestpiece AssemblyWith trumpet brass construction, the Harvey DLX is a professional stethoscope with cardiology grade acoustics that helps you hear more of the important cardiac, pulmonary and vascular sounds without relying on difficult variable pressure techniques. Both the dual head and triple head Harvey DLX stethoscopes are specifically designed to accentuate important sounds and enable you to hear cardiac, pulmonary, and vascular sounds without relying on