Detailed description:Specifications:* P-E-1 = NO. 7 filter cartridge conforms to GB2890-2009 standard* Material: High quality rubber* Connection: Universal screw interface* Protection objects: Protection against acid gases, such as sulfur dioxide, chlorine, hydrogen chloride, hydrogen sulfide, nitrogen oxides, phosgene, phosphorus and oxygen-containing organic pesticides* Conditions of use: Applicable to gas concentration less than 0.1%, oxygen content not less than 18%, the ambient temperature is -30~45°C* Match products: Match ST-AGXD anti-fog-drop filter cotton and filter cover for dust and steam protectionhttps://www..com/dp/B07Z96YWZ8* Packing list :2 Filter boxes and 2 filter cottonInstructions:1. If the filter box is damaged, immediately leave the contaminated area and replace the filter box;2. If you feel uncomfortable or have slight odor during use, you must replace the new filter box;3. The effective protection time of the filter box shall be determined according to the wearer's working intensity (respiratory rate), pollutant type, volatility and concentration, and environmental conditions such as humidity and temperature;4. When the filter box is not in use, it should be stored in a well-ventilated, dark and dry environment. It should not be placed with acid, alkali and other toxic substances.Storage environment:Storage temperature: 0-45℃; Storage humidity: <80%; Storage life: 3 years
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