All models feature a deluxe stainless steel chestpiece, 22" tubing and a stainless steel dual inner-spring binaural. The color-coordinated nonchill ring and diaphragm retaining ring provide excellent patient comfort, while adding to the attractiveness. All models include two extra sets of flexible eartips in two sizes and one extra diaphragm. Overall stethoscope length is 30". The Signature Series carries a lifetime limited warranty.