The tuning fork is made of high-quality aluminum alloy. Due to the characteristics of the material, the 528hz tuning fork has clear timbre and long sound, which is very suitable for overtones and sound healing. Sight-singing and ear-training tuning forks have undergone manufacturing standards and testing, making them corrosion-resistant, and durable. Multifunctional, because 528 Hz is called and can be used to diffuse negative energy and enhance love and peace. Therefore, the 528hz Chakra Tuning Fork is often used for repair, sound healing, meditation, stress relief, and making you feel peaceful and quiet. It is also a musical instrument. Material: Aluminum alloy colour: Gold Package Contents: 2 x 528 Hz tuning fork 2 x 2 x cleaning cloth 2 x storage 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.