Classic dual head stethoscope made from anodized aluminum for extreme lightweight. Fiberglass diaphragm side detects S1 and S2 heart sounds as well as Korotkoff sounds. Bell side is optimally designed for assessing S3 and S4 heart sounds.Incorporates a snap-on diaphragm retaining ring and a non-chill bell ring which contributes to the ease of use and maintenance, while enhancing patient comfort.