Aluminum alloy Light weight and high strength, easy to carry, maintain stable temperature, long service life, non-magnetic, clean and stable sound quality, accurate frequency can be used in many fields Multifunctional tuning fork for healing Can be used for tuning musical instruments, music teaching, medical treatment, sound therapy. Promotes deep relaxation, improves concentration and cognitive function, relieves stress and regulates emotions, facilitates yoga and meditation. Extra long handle and two sound activators The extra long handle is easy to maneuver and reduces fatigue during use. The activators also increase the amplitude and duration of the tuning fork vibrations, ensuring a more consistent and long-lasting sound. Gift With unique design and sound charm, the musician's right hand, practical medical value for doctors, yoga and meditation enthusiasts to gain spiritual healing and relaxation Color: Silver & Black Material: Aluminum Alloy Package Contents: 4 x Tuning Forks (128Hz, 136.1Hz, 256Hz, 384Hz) 1 x Tuning Fork Activator 1 x Wrench 1 x Cleaning Cloth 1 x Hammer (Colors and styles are random, no specified colors and styles are accepted) Only the above package contents, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm._tfrf