... :silicone rubber 2.using time :45min 3.style :with one filter 4.color :blue,grey Half face mask with one ... filter Technical Data1) Weight : <200g2) Exhalation resistance : <50Pa3) Inhalation resistance : <80Pa4) ... the toxic gases like organic steam, benzene and its homologues, gasoline, acetone, ether, ect, and the preventing time above 45 mins ...