Cardiology Stethoscope, Sklar. Dual Head, Burgundy, 28 in., Stainless Steel / PVC. Sklar's Dual Head Cardiology Stethoscope allows the user to hear high, medium, and low frequency sounds, specifically those identified with the heart such as blood flow, clicks, and murmurs. The cardiology stethoscope has thicker, shorter PVC tubing than a standard stethoscope. This provides a shorter distance for the sounds to travel and decreases interference of curled tubing that can occur with longer stethoscopes. The result is a more accurate identification of what is being heard. The Sklar Dual Head Cardiology Stethoscope features a stainless steel diaphragm and bell to further improve sound transmission. This stethoscope measures 25 inches and is available in a variety of tubing colors.