1,media :sythetic fiber 2,weight ;180 gram per square meter 3,color :bule and white 4,stardand size :1*20m,2*20m FRS-30 air inlet cotton for painting booth (manufacture) ·Washable and reusable ·Low initial resistance ·Large dust holding capacity ·Flexible ·Economical and practicalApplication: ≥5μm, Filter dust , (especially used in the train or the subway, where the place has air-conditioner), ...