... 2, Round/Square/hexagonal/etc 3, Screen mesh hole meshpunched hole mesh 1, stainless steel, galvanized steel, aluminum ... Round/Square/hexagonal/etc 3, Screen meshpunched hole mesh Punching hole meshMaterial: steel, stainless steel, galvanized ... Filters/Shields/GuardsCommon Industries Served: Display/Aesthetics, Shielding Liquid, Control Air/Gas, Control Sizing, Filtering, Acoustics, Heat Dissipation, ...