The lightweight MDF Dual-Head Stethoscope combines Diaphragm and Bell flexibility with a full rotation Acoustic Valve Stem to provide sensitive acoustics and professional performance at an affordable price.Chestpiece: Lightweight Diaphragm and Bell Chestpiece and full rotation Acoustic Valve Stem are constructed of anodized aluminum and chrome-plated brass respectively. The Bell side detects low frequency sounds with built-in non-chill Bell Insert Ring for patient comfort. The Diaphragm side is fitted with an Ultra-Thin Fiber Diaphragm for detecting high frequency sounds. The Dual-Head Chestpiece enables users to auscultate a wide range of cardiovascular and respiratory acoustic equencies.AccuFit Headset: Adjustable headset crafted from chrome-plated brass is equipped with ComfortSeal Eartips to provide medical professionals with an anatomic fit for extended usage comfort and superior acoustic transmission.Acoustic Tubing: Single Acoustic Tube in the Y-configuration is constructed of non-cracking non-sticking high-density latex-free PVC.Accessories: Additional (2) ComfortSeal Eartips (1) ultra-sensitive Diaphragm and (1) ID tag.