hole punched steel/aluminum panel factory 1.Hole Dia: ... .ISO9001:2008 4.All shapes hole punched steel/aluminum panel factory1.Hole Diameter:0.3-500mm2.Plate ... 30mm3.ISO9001:2008 4.Material:Low carbon steel, stainless steel, stainless steel, aluminum steel, plywood, hip board, density board, ... outdoor decoration, making the crafts, production of steel and wood furniture, grain ventilation, acoustics unit ...