Littmann Classic 3 stethoscope Littmann Classic 3 stethoscope Head tension can be easily adjusted according to head size and comfort can be adjusted by squeezing or separating the ear tubes against each other. Easy-to-close, soft-closed olives fit individual ears with their excellent acoustic seal and comfortable fit. Olives close tightly to the ends of the ear tubes and force is required to separate them for safety reasons. The flexible new generation hose retains its shape and flexibility even after tightly packed into a pocket. It provides a longer stethoscope life with improved resistance to skin oils and alcohol, and improved resistance to stains. The new generation hose is not made of natural plastic latex. This benefits sensitive medical personnel and their patients. And as a contribution to human health and environmental protection, the new generation hose does not contain phthalate plasticizers. Littmann Classic 3 stethoscopeLittmann Classic 3 stethoscope The Classic III stethoscope is manufactured in the USA to ensure consistent quality. Hose length 69 cm Diaphragm diameter: 5.3 cm Small diaphragm diameter: 3.3 cm.