Perforated 304 Stainless Steel Part Number             Hole size           Pitch              % Open area               Sheet size                  Thickness S2204                      1.00mm            2.00mm                     23                         2M x 1M                  0.80mm S2304                      1.25mm            2.40mm                     25                         2M x 1M                  0.70mm S2504                      1.50mm            2.60mm                     30                         2M x 1M                  1.00mm S3804                      2.00mm            3.00mm                     40                         2M x 1M                  1.00mm S4004                      2.00mm            3.50mm                     30                         2M x 1M                  1.00mm S4804                      2.50mm            4.00mm                     36                         2M x 1M                   0.60mm S5704                      3.00mm            4.50mm                     40                         2M x 1M                   1.20mm S6404                      3.00mm            5.00mm                     33                         2M x 1M                   1.50mm S6504                      3.00mm            5.00mm                     33                         2M x 1M                   2.00mm S6704                      4.00mm            6.00mm                     40                         2M x 1M                   1.00mm S7104                      5.00mm            7.00mm                     46                         2M x 1M                   1.00mm S7204                      5.00mm            8.00mm                     35                         2M x 1M                   1.50mm S7304                      5.00mm            8.00mm                     35                         2M x 1M                   2.00mm S8204                      6.00mm            9.00mm                     40                         2M x 1M                   0.60mm S8604                      6.00mm            9.00mm                     40                         2M x 1M                   1.00mm S9104                      6.00mm            9.00mm                     40                         2M x 1M                   1.50mm S9504                      8.00mm          12.00mm                     40                         2M x 1M                   1.50mm   STAINLESS STEEL 316 BRASS COPPER MILD STEEL ALUMINIUM