Tuning Forks are U shaped, two prong instruments that emit a specific tone when struck, or striking an object with it. The sound is pure, making it useful for tuning (as the name suggests) as well as sound healing purposes. Using tuning forks during a sound healing session aid in total relaxation, allowing the client to hear and feel the vibrations more effectively. This product is in Green Color tuned to 136.10Hz as 4th chakra, Heart and it comes with a mallet inside a green velvet carry case. Dimensions (in):10.5″L x 1.5″D tubes, 7″Strikers, 11″ x 3.5″ bags Weight (lbs.):5.11 lb