Spiromatic Face Mask with Spiromatic Breathing Valve. Inner mask separates inhaled and exhaled air to minimize the danger of breathing exhaled carbon dioxide. Bayonet coupling with positive locking. First breath activation of positive pressure. Silent operational mode. Fits spectacles and communications equipment. NFPA 1981:2002, EN 136 Class 3, EN 137 certified. Dimensions: 230 x 170 x 130 mm. Weight: 0.77 kg.
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