W3563 Tytan Professional Series Deluxe Child Stethoscope Highest quality stainless steel dual head chestpiece for both diaphragm and bell. nSpecial dual inner-spring stainless steel binaural. nElegantly moulded 22" thick-walled PVC "Y" type tubing for durability and outstanding sound transmission. nAll models come in a foam lined box with two extra sets of eartips. n5 year warranty.