... :ISO9000 width:0.5m-3m length:1m-5m Round Perforated MetalPerforated metal has a greater, more predictable ... ,copper,carbon steel,Galvanized.Opening Pattern:Rectangle, square, round, triangular, blossom, hexagonal and many other special patterns ... Expanded metal sheet, perforated mesh,etched mesh,punch mesh.Any shape Perforated MeshStainless steel Perforated MeshEtched mesh(by Chemical Erode)Punch ...