Features: Made of high quality aluminum alloy material. Tuning do the vibrational properties of our wonderful universe. It provides instant deep relaxation and improves mental clarity and brain function. Improve your physical strength and mental focus. Reduce stress by pulling your body do of the central space. Develop and improve your sound capabilities. Enhanced massage, acupressure, dreaming and meditation. Balance your nervous system. Integrate left and right hemisphere thinking patterns. Ergonomic shape, anti-corrosion, preservative. Designed for the perfect balance of instruments with high performance and excellent craftsmanship. Specification: Material: aluminum alloy; Color: Silver Size: 256Hz: 20x2,5x1cm/7,8''x0,98''x0,39'' 288 Hz: 19x2,5x1cm/7,4''x0,98''x0,39'' 320Hz: 18,5x2,5x1cm/7,3''x0,98''x0,39'' 341,3 Hz: 18x2,5x1cm/7''x0,98''x0,39'' 384Hz: 17,5x2,5x1cm/6,9''x0,98''x0,39'' 426,6 Hz: 17x2,5x1cm/6,7''x0,98''x0,39'' 480Hz: 16,3x2,5x1cm/6,4''x0,98''x0,39'' 512 Hz: 16x2,5x1cm/6,3''x0,98''x0,39'' Hammer length: 18 cm/7'' Set of 8 harmonic spectra includes 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 288 Hz Temple: E 320 Hz Heart: F 341,3 Hz Throat: G 384Hz Third oko: 426,6 Hz Korona: B 480 Hz High Core Octave: C 512hz List of packages: 8 * tuning fork 1 * hammer; 1 * wooden box Please be aware: Please be aware: