Frequency: 256Hz, 288Hz, 320Hz, 341Hz, 384Hz, 426Hz, 480 Hz, 512Hz Made of high-grade materials and the use of wooden outer packaging, with a mallet. It can be used in physics classes to verify the occurrence of sounds and to explain the relationship between tones and audio. It can also be used as a health care massage tool. 8 tuning forks of different frequencies can be used as the tuning standard for musical instruments. It can be applied in music room, health club and so on. Color: As Shown Material: Metal Package Contents: 8 x Tuning Forks 1 x Mallet 1 x Wooden Box 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.