1、Tuning to the vibrational properties of our magnificent universe. 2、Provides instant deep relaxation and improve mental clarity and brain function. 3、Improve your physical strength and mental concentration. 4、Reduce stress by pulling your body into a central space. 5、Enhanced massage, acupressure, dreaming and meditation. Features: Made of high quality aluminum alloy material. Tuning to the vibrational properties of our magnificent universe. Provides instant deep relaxation and improve mental clarity and brain function. Improve your physical strength and mental concentration. Reduce stress by pulling your body into a central space. Develop and improve your sound capabilities. Enhanced massage, acupressure, dreaming and meditation. Balance your nervous system. Integrate left and right brain thinking patterns. Ergonomic design,anti-rust,preservative. Designed for the perfect balance of instruments with high performance and superb craftsmanship. Specification: Material:Aluminum Alloy Color:Silver Size: 256Hz:20x2.5x1cm/7.8''x0.98''x0.39'' 288Hz:19x2.5x1cm/7.4''x0.98''x0.39'' 320Hz:18.5x2.5x1cm/7.3''x0.98''x0.39'' 341.3Hz:18x2.5x1cm/7''x0.98''x0.39'' 384Hz:17.5x2.5x1cm/6.9''x0.98''x0.39'' 426.6Hz:17x2.5x1cm/6.7''x0.98''x0.39'' 480Hz:16.3x2.5x1cm/6.4''x0.98''x0.39'' 512Hz:16x2.5x1cm/6.3''x0.98''x0.39'' Mallet Length: 18cm/7'' The harmonic spectrum 8pcs set contains a complete tuning fork octave (C, D, E, F, G, A, B, C) These 8 tuning forks are based on: Root: C 256Hz Tibia: D 288Hz Temple: E 320Hz Heart: F 341.3Hz Throat: G 384Hz Third eye: 426.6Hz Crown: B 480Hz High octave of the root: C 512hz Package List: 8*Tuning Fork 1*Mallet 1*Wood Box