ADC Adscope 613 Teaching Stethoscope, Includes Student and Instructor Headset, Black and Royal Blue Includes a stainless steel chestpiece and binurals for excellent acoustics To help differentiate between instructor and student, we use one set of black tubing with black ear tips and one set with royal blue tubing with gray ear tips Includes 2 sets of stainless steel binurals Inspected and packaged in the usa Lifetime warranty