3M Littmann Classic III and Cardiology IV Spare Parts | Hopkins Medical Products
Durabasics Classic 3, Cardiology 3 & Cardiology 4 Stethoscope Accessories Kit for Littman Stethoscope Replacement Parts & Littmann Stethoscope Parts - Fits Classic III, Cardiology III & IV - Black
Amazon.com: 3M 40016 Littmann Stethoscope Spare Parts Kit, Classic III, Black : Industrial & Scientific