Traditional heavy-walled vinyl tubing blocks extraneous sounds. durable, chrome-plated zinc alloy rotating chestpiece features two inner drum seals, effectively preventing audio leakage. five interchangeable chestpieces – adult and child diaphragms and three bells – offer professionals a variety of diagnostic uses. includes: latex-free 5-in-1 interchangeable chestpiece black stethoscope with soft vinyl eartips, convenient chestpiece key for easy diaphragm replacement, three bell sizes, two spare diaphragm sizes, two spare eartip sets in two styles, and accessory pouch.