This product is registered by Yagyu Shokai Co., Ltd..
About This Product
■Features
If you shrink it before use, it will naturally expand and become larger in your ear.
■Specifications
・Material: Polyurethane
・Plug size: φ11×23mm
・NRR value: 32dB
・MRI room available
・AnSIS3.19-1974 compliant product, JIS T8161EP-1 (Type 1) compliant product
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