... Material:ss sheet,GI. High quality perforated metal mesh ( factory & ISO9001:2000)perforated metal mesh Thickness:0.2mm-8mm Length:1m-20m ... hole screening board is widely used in protecting from ambient noise where the highway, railway and subway come through the ... , building walls, generator room, factories, and other noise sources in acoustic noise with sound-absorbing panels that can be used in ...