Square Hole Expanded Metal Mesh Expanded Metal Wire Mesh Rigidity Expanded Metal Mesh Product Name Square Hole Expanded Metal Mesh Material Carbon steel, stainless steel, hot or electro galvanized steel and aluminum. Hole size 0.2" 0.75". Hole Centres 0.5" 1" Hole Pattern Staggered and straight row. Open Area 11% 56%. Width 36" to 48". Length 24" to 120".