[ ] Adjusting Fork Set is made of material. Compared with steel tuning forks on the market, it is more refined in workmanship, lighter in weight, and durable in corrosion-resistant aluminum alloy construction. [Accurate Frequency] Tuning Fork Set has more accurate frequency and frequency up to 25 seconds. [Multifunctional] Adjustment Fork Set is suitable for treatment. great for repair, balancing energy centers, enhancing focus, purifying the mind and body, and also great for wellness treatments and playing with pets. This frequencies is:MI 528 HZ Colour:Gold Material:Aluminum alloy Package Contents: 1 x rubber mallet 1 x triangular silicone(Colors and styles are random, no specification is accepted) 1 x tuning forks 1 x storage bag 1 x cleaning cloth 1 x base 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.