... galvanized sheet plate, cold-rolled coil, hot rolled coil ,aluminum copper plate and so on . 2.Categories: pattern perforated metal, ... net,heavy perforated metal, especially thin perforated metal, micro hole mesh, perforated metal wire cutting, laser perforated metal, etc. 3.Hole Types : ... 50mm b. length : to 20 m c. Aperture : 3 mm - 10 mm 5.Applications :noise control barrier ,building stairs ...