... electro galvanized or hot dipped the forms of rolls or panels, for construction, fences and other industrial enjoys the feature of ... Diameter 1/4" x 1/4" 6.4mm x 6.4mm 22,23,24 3/8" x 3/8" 10.6mm x 10.6mm 19,20 ... 1/2" x 1/2" 12.7mm x 12.7mm 16,17,18,19,20,21,22,23 5/8" x 5/8" 16mm x 16mm 18 ... ,19,20,21, 3/4" x 3/4" 19.1mm x 19.1mm 16 ...