1.Aluminum round hole perforated metal 2.thickness :From 0.5mm to 4mm 3.ISO9001;2008 4.fast delivery round hole perforated metals ... elimination, machine-protecting and decoration etc.Hole shape:Long hole, round hole, square hole, triangle hole, scale hole, bridge hole, diamond hole, pentagonal holes, hexagonal holes, ... .61.721.5221219.63.2424161219.64.23 Round Hole Punch Perforated Metal(Factory)