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
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Amazon.com: MDF ProCardial ER Premier Cardiology Stainless Steel Dual Head Adult-Pediatric Stethoscope with adult cardiology bell convertible attachment-Free-Parts-for-Life/Lifetime Warranty(MDF797DD)(Gold/Black) : Industrial & Scientific