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Optime II, helmet attachments, wide and comfortable rings are filled with a combination of fluid and foam, optimal sealing and low pressure. Sound attenuation 31 dB. Suitable for substantial noise, muffle even extremely low frequencies to a maximum degree.
| Norms |
Norms
EN 352-3 |
| Hodnota útlumu |
Hodnota útlumu
30 dB |
| Brand |
Brand
3M |
| Výrobce / Dodavatel |
Výrobce / Dodavatel
3M Česko, spol. s r.o., V Parku 2343/24, 148 00, Praha 4, 3m.costumercollections.cz@mmm |
