SoundFlo Stethoscope Frame By Genius is a universal frame, that can be used in all tubing. It is ergonomically designed, made of good quality steel and has soft ear knobs that allows for efficient flow of sound.
It has snug soft-sealing ear tips that provide decent sound quality by stopping most external sound.
Tension Spring helps you to adjust, how tight the stethoscope is sitting on your ears.
 
Features - 
Can be used in all tubing
Efficient Flow of Sound
Made of Steel
Soft Ear Knobs