round hole perforated metal Thickness: 5-10mm Aperture: 0.4-100mm Accord with ISO9001:2000 Screen, filter,shield Round Hole Perforated Metal (round hole perforated ... steel, low carbon steel, galvanized steel3) Plate thickness: 5-10mm4) Aperture: 0.4-100mm5) Hole pattern: round, square, triangle, diamond, oval, hexagon ...