Yuwell Professional Stethoscope Medical Equipment

Yuwell Single- Purpose Copper Stethoscope Features: The Stethoscope head is made of copper, The erring and trilet aremade of high grade copper material so that you can hear the soundmore clearly, What' s more, the hose has good elstiaty becausetismade of elastic strength plastic PVC. The leaf spring is made ol highstrength spring steel Technical Parameters Frequency response curve: 100-500Hz, Attenuation12dB; Frequency response curve: 500-100z, Attenuation20dB The hardness of leaf spring: HR15N829-884 The earing elasticity: When the distance betwen two earpliugs is 140mm,the elasticity value is: 1.3721.960N The earing elasticity: Pull the two earplugs 300mm apart from each other and it can recover within 1 minute. The deformation is no more than 10mm. Package Included: 1 x Stethoscope