Harvey Deluxe Double Head Stethoscope, Black, 28"Welch Allyn Harvey DLX Stethoscopes has 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. *** Manufacture Direct, Ships in 14 21 Days *** The Harvey DLX is equipped with dual bore tubing that creates two uninterrupted sound channels and works with the