... hole 2> thicknessaa0.1-8mm 3> Opening: 0.1-100mm Perforated Metal MeshMaterials: low carbon steel plate, galvanized steel plate, aluminum ... ,grain,sound insulation of room,ventilate of grain depot,etc.Plain Steel Perforated Metal Hole DiameterStaggered CentersSheet ThicknessOpen Area0.045"1.14mm0 ... or not , PE or PVC , many colors .unique requirements applications Perforated Metal Mesh