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MDF MD One Stethoscope MDF777 Dual Head - Black | eBay
Amazon.com: MDF ProCardial ERA Cardiology Lightweight Dual Head Stethoscope with Adult, Pediatric, and Infant-Neonatal Convertible chestpiece - Light Blue Tube - Black Finish (MDF797XB14) : Industrial & Scientific
Amazon.com: MDF ProCardial Cardiology Stethoscope, Stainless Steel, Adult, Dual Head, Black Tube, Black Chestpiece-Headset, MDF797BO : Industrial & Scientific