... GI steel,aluminum plate,mild steel Mini expanded metal Hole size:1.5*3mm,3*6mm,4 ... 7mm Material:GI steel,aluminum plate,mild steelMini Expanded Metal Material: low carbon steel, stainless steel, aluminum plate ... 5mm,2mm,3mm,4mm,5mm Characteristic: The expanded metal process takes regular steel and expands it into ... and air compressors, safety guards for gear-drive equipment on various kinds of machines.