TPR frame,single active-carbon can,protect against dust,mist,paint,acid-gas,organic-gas,Hg vapor,ammonia,sulfureted hydrogen,etc TPR frame of chemical respirator1. single active-carbon can,2. protect against dust,mist,paint,acid-gas,organic-gas,Hg vapor,ammonia,sulfureted hydrogen,etc3. conform to EN140, CE approval half mask chemical respirator