[HIGH QUALITY]Adjusting Fork Set is made of high quality material. Compared with steel tuning forks on the market, it is more refined in workmanship, lighter in weight, and in aluminum alloy construction. [Accurate Frequency]Tuning Fork Set has more accurate frequency and frequency up to 25 seconds. F174 F285 UT396 RE417 MI528 FA639 SOL741 LA852 F963 [Multifunctional]Adjustment Fork Set is suitable for music. great for music, balancing energy centers, enhancing focus, purifying the mind and body, and also great for wellness music and playing with pets. This frequencies is: F174 F285 UT396 RE417 MI528 FA639 SOL741 LA852 F963 Material: Aluminum alloy colour: gold Package Contents: 2 x rubber mallet 1 x random Triple-cornered blocks(randomly colored. Cannot be chosen the specific color.) 9 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.