... :Perforated Filter Rating:70% Thickness:0.2--10mm Punching hole meshMaterial: stainless steel plate, low carbon steel plate, ... plate and kinds of nonmetal plates. Hole Shapes: round, length, square, scale hole, hexagonal hole, plum blossom and so on.Processing: ... other advantages such as uniform sound abatement, attractive appearance, light weight, durable, superior abrasion resistance and accuracy of ...