[High Quality Aluminum Alloy Material]C128, C512, C256 tuning forks are made of high-quality aluminum alloy materials, with clear sound, resistance,non-magnetic and no rust.It is very suitable for home, school or clinical use. [ & Easy to Use]The chakra tuning fork set has an extra-long turned robust aluminum handle, which can be readily evaluated for bone conduction and is easy to use. It is made of but materials and is comfortable to hold. It is equipped with a flannel bag for easy outings. [ Effect]The tuning forks for healing has exceptional performance and consistent frequency accuracy. The sound quality not have much deviation. [ERGONOMIC DESIGN AND EASY TO USE]The rounded design of the tail ly combines aesthetics and comfort, and comes with a silicone hammer for added control over striking force, allowing you to better use your tuning fork. Material: Metal colour: black + silver Package Contents: 12 x Tuning Fork (128 Hz, 256 Hz, 512 Hz) 4 x wrench 4 x bag Only 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.