[ High quality material ] The tuning fork is made of high-quality aluminum alloy material, which is durable, not easily deformed, corrosion-free, and rust free, and can be used for a long time. Our tuning forks are professionally tested together, and there may be some sound differences, making them perfect gifts for friends. [Practical Instrument ] ToolThe aluminum alloy tuning fork is not only a practical tuning tool for string instruments, but also helps you to relax, relieve anxiety, refresh your mind and get into a state of deep meditation faster. The tuning fork's unique metallic frequencies improve people's ability to recognize sounds and improve their hearing [Compatibility] 512 Hz tuning fork is suitable for sound therapy, energy work, balance, meditation, stress relief, relaxation, not suitable for hearing tests, yoga physiotherapy, SPA aromatherapy, music performances, physical experiments and other scenes Color: silver Material: aluminum alloy Package Contents: 1 x Hammer (colors and styles are random, Not accepting designation) 1 x tuning forks 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.