The commonly used specifications are:
Opening/Gap: 4 inches x 4 inches
Wire Thickness: 4 mm
Width: 1 mtr or 4 ft.
Length: 13 mtr, 13.5 mtr, 39 mtr or any other specific length.
Material: Mild Steel (M.S.) (It can also be manufactured in galvanized steel or stainless steel)