Perforated metal sheets: -- round hole,square hole -- Hole 0.1mm-100mm -- Low carbon steel, Aluminum, ... other materials you need.-- perforated metal sheets hole shape:diamond, square, circle, triangle and decorative patterns -- perforated metal sheets ... 6221219.63.2434161219.64.23-- perforated metal sheets uses:widely used in highway, railway, civil construction, and water conservancy construction, ...