... oil field drilling, mine screening,engineering, sifting of grains, decorations and designs of buildings. Perforated Metal hole shape: Round, Square ... , etc Perforated metal can be made from a variety of material: Stainless Steel, Carbon Steel, Galvanized, Aluminum. ... Perforated Metal Specification:Opening (mm)Center type(mm)Thickness of sheet (mm)min-maxSize (mm)Stainless SteelIronAluminum1≥20. ...