[Tuning Fork Set] The therapeutic tuning fork is machined from aluminum alloy and precisely tuned to within 0.5% of the specified frequency, producing a clear, long-lasting tone that resonates deeply through the body. [128Hz Tuning Fork] Weighted tuning fork commonly used for hearing tests, neurological assessments, and relaxation. Can be applied to bones, joints, muscles, and nerves to support resonance and nervous system stimulation. [136.1Hz Tuning Fork] Weighted tuning fork ideal for meditation and relaxation. Can be placed near the ear or on joints and muscles to promote physical relaxation and stress relief. [528Hz Tuning Fork] Commonly used for sound therapy and relaxation. This frequency is known for its calming effect on the mind and body. [4096Hz Tuning Fork] High-frequency tuning fork used for sound therapy applications. Can be used near the ear or on the body to support mental clarity and focus. Color: Silver Material: Aluminum alloy Package Contents: 2 x drumsticks (color style may vary) 4 x tuning forks with massage ball 1 x small wrench (color style may vary) Only the above package content is included; other items are not included. Note: Light reflection and different displays may cause slight variations in color. Measurement error allowed is +/- 1-3 cm.