The tuning fork set is made of high-quality aluminum alloy material, with fine workmanship and high precision. Aluminum alloy construction offers dependable, solid strength as well as - qualities. The resonance box, made of high-quality wood, the tuning fork is placed on this wooden speaker, which has an amplification effect. The sound quality is not too exaggerated, you will feel that the resonance effect is more profound and stable, and the listening feeling is natural and comfortable. Widely used, 528 Hz is the frequency of love, perfect for deep relaxation, repair healing, stress pain relief, increased focus, and cleansing of the mind and body. Suitable for yoga therapy, SPA aromatherapy, tuning fork resonance teaching, hearing test, and other scenarios. Colour:Silver & Wood Color Material:Wood + aluminum alloy Size:Resonant Box:About 18cm long Package Contents: 1 x Tuning Fork 1 x Resonant Box 1 x Hammer 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.