Product Highlights:
Quality brass double head stethosope.
Clear and precise sound.
Stem tube is made of elastic and durable PVC.

Product Specifications:
Response curve: 100-500Hz as the reference of the testing sound source
Damping < 12dB, 500-1000Hz < 20dB
Hardness of spring sheet: HR15N82.9-88.4
Earrings stretch: Elastic force 1.372-1.960N

Product details of

Product Highlights:Quality brass double head stethosope.Clear and precise sound.Stem tube is made of elastic and durable PVC.Product Specifications:Response curve: 100-500Hz as the reference of the testing sound sourceDamping < 12dB, 500-1000Hz < 20dBHardness of spring sheet: HR15N82.9-88.4Earrings stretch: Elastic force 1.372-1.960N