Acoustics The Symphony Tunable stethoscope offers a solid, zinc die-cast, single-sided chest piece that features a diaphragm-on-a-diaphragm design, allowing you to monitor high and low frequency sounds without moving the chestpiece or pressing a button. Also available with a double-sided chestpiece. Durability The Symphony Tunable stethoscope is designed for long-lasting durability. The DRG tubing is made of PVC that is resistant to cracking, kinking, or breaking. The binaurals are made of brass with an aluminum painted finish and are barbed to lock the eartips in place. Comfort The Symphony Tunable stethoscope is designed with comfort in mind for both patient and professional. The black GELseal™ eartips ensure an uncompromising acoustic seal and comfortable fit. Each stethoscope comes with 5 DRG SafeSEAL™ diaphragms, which provide a soft, non-chill surface, and offer comfortable patient interface. The SafeSEAL, impregnated with an antimicrobial compound, helps prevent the growth of health-threatening microbes while delivering quality sound transmissions.