Dual head styles are used throughout the healthcare setting primarily by doctors who need to listen to both heart and lung sounds. Many hospitals use these lower cost but high quality stethoscopes to avoid high replacement costs for lost or stolen units.Lightweight aluminum combination chest piece with 1.25 non chill bell with non chill rimAdjustable chrome plated brass binaural with PVC ear tipsFlexible black PVC tubingOverall length 30Weight 4 oz.