round hole perforated metal sheet characteristics :it is punched to mesh, including aluminum ... , aluminum, aluminum-plastic, copper, nickel, titanium, PVC and other sheet materials.Opening pattern : Round, oval, square, rectangular hole, rhombus, ... toilet supplies, muffler, decoration, construction, electronics, transport, etc. Brief Information of Perforated Metal Hole Size: 0.1MM-100MM Thickness: 0 ...