... carbon steel plate, galvanized plate, PVC cold rolled plate, etc.Hole Pattern: Rectangular, Square, Diamond, Round, Hexagon, Cross-shaped, Triangular, Oblong ... , O-waist, Wintersweet hole, fish scale, design shape, pertacle hole, random hole, bulge hole, etc.Characteristics: the surface is smooth ... ,noise elimination,machine-protecting and decoration etc. punching hole mesh