Expanded metal mesh is available in two main types: standard expanded steel mesh (raised/regular) and flattened expanded metal mesh. Raised expanded metal mesh features diamond-shaped openings with a slightly raised surface. It provides structural strength, airflow, and visibility. Flattened expanded metal mesh is created by passing the standard expanded sheet https://www.hpstainlesssteelmesh.com/products/expanded-metal-4x8-sheet.html