The inner face piece is non-irritating to ensure added user comfort. To be disposed of after each period of work or 8 hour shift. AB 36-38 & 55-56, BT (all), FK 17-21, HS (all), IM (all), IV (all), KA 27-28, KW (all), PA 20-99, PH 15-99, ZE (all), Channel Islands.
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