The unique-looking chestpiece is sturdy, dependable and delivers up to two times the amplification of conventional stethoscopes! Made of a lightweight acrylic, the "crystal" chestpiece can be personalized with pictures, logos or even stickers. Just unscrew the metal diaphragm retaining ring and insert a favorite photo. Stainless steel inner spring binaurals and heavy-walled 22" vinyl tubing block out extraneous sounds. Overall length is 30". Comfortable small rubber threaded eartips, stethoscope ID tag and manufacturer s lifetime limited warranty included.