ADC Adscope 603 Clinician Stethoscope with Tunable AFD Technology, 31 inch Length, Gray Combination chestpiece is CNC machined to exacting tolerances from surgical stainless steel. Ultra-sensitive, non-chill diaphragm for greater amplification and crisper high-frequency transmission; extra-large, non-chill bell for unsurpassed low-frequency response. Adjustable frequency design (AFD) enhances acoustic performance. Clinician headset features reinforcing yoke molded into flexible 22-inch PVC tubing, stainless steel binaurals (tactical finish has black anodized aluminum binaurals), and Adsoft Plus silicone eartips for the ultimate in wearing comfort and acoustic seal. Includes two additional pairs of Adsoft Plus eartips and a complimentary scope ID tag. Lifetime warranty and free "consumables," including diaphragms and eartips, when registered.