Perforated metal panels and screens for architecture can be used as balcony, partitions, faade, elevator cabinet and other parts of buildings. Materials: Stainless steel sheets, aluminum or galvanized iron sheets. Specify the following when order: Materials; Hole pattern; Open area; Strength; Hole size and thickness.Typical patterns for perforated screen include slotted, embossed, diamond, square and round.Slotted perforated metal is produced in ferrous materials in plates, stainless steel or galvanized steel. Oblong Slotted Perforated Metal Screen Information: 3.175 x 25.400 mm oblong slot 6.350 mm centers Side Staggered 43% open 22 gauge steel Length of oblong slots run length of sheet. 1/4" Slotted Perforated Metal Screen 6.350 x 38.100 mm slot Every third bridge 4.763 mm wide Other bridges 2.381 mm 67% open area of sheets 16, 18, 20 gauge steel Length of slots runs width of perforated sheet.