color:silver weight:600g Material: Steel Box Size: 22x16x3.5cm / 8.7x6.3x1.4inch Tuning fork size: 256Hz:14x2.5x1cm/5.5"x0.98"x0.39" 288Hz:13.5x2.5x1cm/5.3"x0.98"x0.39" 320Hz:13x2.5x1cm/5.1"x0.98"x0.39" 341Hz:12.5x2.5x1cm/5.0"x0.98"x0.39" 384Hz:12x2.5x1cm/4.7"x0.98"x0.39" 426Hz:11.5x2.5x1cm/4.5"x0.98"x0.39" 480Hz:11x2.5x1cm/4.3"x0.98"x0.39" 512Hz:10.8x2.5x1cm/4.2"x0.98"x0.39" Mallet length: 19cm/7.5" Frequency: 256Hz, 288Hz, 320Hz, 341Hz, 384Hz, 426Hz, 480 Hz, 512Hz Feature: Made of high-grade aluminum alloy 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.