... 3 holes sizes 0.5 to 20mm Detailed introduction to Perforated Metal:Material: Stainless steel, aluminum, hot and cold steel, ... , stretching shaped hole shaped hole punch and other stampings.Uses: Perforated mesh sieve is widely used across the city lots of highway ... ; can be used for mechanical equipment, protective cover, ornate speaker mesh cover, food , feed mill screen used mine, mine screening, ...