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. Sight-singing and ear-training tuning forks have undergone manufacturing standards and testing, making them , and . It is also a musical instrument. Material: Aluminum alloy colour: Gold Package Contents: 1 x 528 Hz tuning fork 1 x 1 x cleaning cloth 1 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.