... at least above US$10000.JK-HTS-A Head Three Stethoscope (Main materials) Steel, Plastic Pipe, Spring. (Technical Parameters) ... diameter: 36mm.Bell auscultation head diameter: 24mm.Table-type stethoscope head diameter: 40mm.(Function)Pulse amplified sound, easy to ... and effective change. (Product Configuration)The three models use stethoscope, configuration a Auscultation head, a bell-shaped head and ...