Hole Patterns: Round, Rectangular hole, Square,Triangle, Diamond, Hexagonal, Cross, Slotted etc. Used in filter Perforated Metals:Stainless steel Perforated Metal SheetGlavanized Steel Perforated Metal SheetAluminum Perforated Metal SheetBrass/Copper/Phosphor Bronze Perforated MetalPerforated Metals Material:Stainless steel sheet,Galvanized steel sheet,Aluminum sheet,Brass/Copper/Phosphor Bronze ...