... 20m Hole diameter:0.8mm-20mm Material:ss sheet,GI. High quality perforated metal mesh ( factory & ISO9001:2000)perforated metal ... .Hole of perforated metal mesh: round, length, square, scale hole, hexagonal hole, plum blossom and so on.Application ... configurations6. Uniform sound abatement,7. Attractive appearance,8. Light weight,9. Durable,10 Superior abrasion resistances11. Accuracy of sizespecial ...