FengYoo Perforated Metal Sheets Perforated Stainless Steel Sheet-Sheet Metal with Holes-20GA 0.4 Inch Hole 11.8 Inch X7.8 Inch-Suitable for Ventilation Smoking and Decorative Screen Style Grilles : Amazon.ca: Office Products
304 Stainless Steel Perforated Sheet, Unpolished (Mill) Finish, Annealed, Staggered 0.125" Holes, 0.06" Thickness, 17 Gauge, 12" Width, 12" Length, 0.1875" Center to Center : Amazon.ca: Industrial & Scientific
3mm Round Hole Stainless Steel Perforated Sheet Metal - 5mm Pitch - 1mm Thick - The Mesh Company