Experience ultimate sound therapy with our OM Set of 14 tuning forks from INNER SOUND. They are based on the OM frequency of 136.1 Hz. Made in the US from high-grade aluminum alloy, and tuned twice so every pair is a true fifth. INNER SOUND forks are heard, not pressed against the body. You listen to them.  
Consider taking our virtual Tuning Fork training to gain the most benefit from these tuning forks.