These Perforated Metal Sheets are made of 304 stainless steel sheet,Polished surface, shiny and shiny -19Gauge thickness, 0.32" round holes (about 8mm), 0.16" (about 4mm) Dislocation triangle arrangement, Sheet Metal With Holes is suitable for Metal Sheet Decorative, Burn Barrel Lid, BBQ Grill, Car Grill,Speaker grille, Perforated Metal Screen, Burn Barrel Ember Retainer, Metal Grates for Drainage, Fish Pond, Garden, Small Animal Protection, Corten Steel Panels for Oven, Sheets of Metal for Metal Grates for Drainage, you can buy it back and put it in the warehouse for spare, you will use it in the future