Product Description Specification: Frequency: 128hz, 256hz, 521hz Material. Tuning fork: aluminum Tone hammer main material: silicone Tuning fork color: Silver/Gold Size. About 7 inches long Features: >Made of aluminum alloy, corrosion resistant and non-magnetic. Light weight and durable. >Ergonomically designed, smooth and extended handle for comfortable grip and easy bone conduction testing. >Excellent performance and consistent frequency with clear tone. >Best choice as a gift. >Wide range of applications. .
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