tuning forks are made of high quality aluminum alloy, which is more delicate, durable and lighter. Due to the nature of material, these tuning forks are corrosion-resistant and sturdy. With manufacturing and testing standards, the tone is clear; the sound is long and the frequency is precise.tuning forks are widely used in , sound healing, meditation, easing anxiety, yoga and so on. 174 Hz - 963 Hz is perfect for balancing energy centers, enhancing attention, purifying the body and mind, as well as playing with pets and music performance. Buying a tuning fork set can meet your different needs.Tuning forks: 174 Hz, 285 Hz, 396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz, 963 Hz.Tuning forks set for healing includes a beautiful wooden stand. A wooden stand makes it easier to store and show your tuning forks. After using them, you just need put 963 hz tuning fork back to wooden stand, saving time and energy. Put in room, this also can be a attractive decoration.Colour:silver+wood colorMaterial:Aluminum alloy + woodPackage Contents:9 x tuning forks1 x hammer(Random color and random style, don't accept the specified)1 x storage bag1 x wooden standOnly the above package content, 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 +/- 1-3cm.