... metal sheet as raw material ,perforated mesh is of round,square,rectangular or quincunx shape,punched by special mesh ... aluminum, copper).Shape: long square hole, square hole, round hole,triangle hole, hexagonal hole, the plum blossom hole, ichthyosisthe hole,scale hole and other different kinds of holeApplication ... and size can be avaliable as your request. Round Hole Galvanized Perforated Metal Mesh